Tkinter rename reversal: remove tkinter package, adapt imports and docs.

1 files changed, 0 insertions, 956 deletions

diff --git a/Lib/tkinter/turtle.py b/Lib/tkinter/turtle.py
deleted file mode 100644
index 0d343e6..0000000
--- a/Lib/tkinter/turtle.py
+++ /dev/null
@@ -1,956 +0,0 @@
-# LogoMation-like turtle graphics
-
-"""
-Turtle graphics is a popular way for introducing programming to
-kids. It was part of the original Logo programming language developed
-by Wally Feurzeig and Seymour Papert in 1966.
-
-Imagine a robotic turtle starting at (0, 0) in the x-y plane. Give it
-the command turtle.forward(15), and it moves (on-screen!) 15 pixels in
-the direction it is facing, drawing a line as it moves. Give it the
-command turtle.left(25), and it rotates in-place 25 degrees clockwise.
-
-By combining together these and similar commands, intricate shapes and
-pictures can easily be drawn.
-"""
-
-from math import * # Also for export
-from time import sleep
-import tkinter
-
-speeds = ['fastest', 'fast', 'normal', 'slow', 'slowest']
-
-class Error(Exception):
-    pass
-
-class RawPen:
-
-    def __init__(self, canvas):
-        self._canvas = canvas
-        self._items = []
-        self._tracing = 1
-        self._arrow = 0
-        self._delay = 10     # default delay for drawing
-        self._angle = 0.0
-        self.degrees()
-        self.reset()
-
-    def degrees(self, fullcircle=360.0):
-        """ Set angle measurement units to degrees.
-
-        Example:
-        >>> turtle.degrees()
-        """
-        # Don't try to change _angle if it is 0, because
-        # _fullcircle might not be set, yet
-        if self._angle:
-            self._angle = (self._angle / self._fullcircle) * fullcircle
-        self._fullcircle = fullcircle
-        self._invradian = pi / (fullcircle * 0.5)
-
-    def radians(self):
-        """ Set the angle measurement units to radians.
-
-        Example:
-        >>> turtle.radians()
-        """
-        self.degrees(2.0*pi)
-
-    def reset(self):
-        """ Clear the screen, re-center the pen, and set variables to
-        the default values.
-
-        Example:
-        >>> turtle.position()
-        [0.0, -22.0]
-        >>> turtle.heading()
-        100.0
-        >>> turtle.reset()
-        >>> turtle.position()
-        [0.0, 0.0]
-        >>> turtle.heading()
-        0.0
-        """
-        canvas = self._canvas
-        self._canvas.update()
-        width = canvas.winfo_width()
-        height = canvas.winfo_height()
-        if width <= 1:
-            width = canvas['width']
-        if height <= 1:
-            height = canvas['height']
-        self._origin = float(width)/2.0, float(height)/2.0
-        self._position = self._origin
-        self._angle = 0.0
-        self._drawing = 1
-        self._width = 1
-        self._color = "black"
-        self._filling = 0
-        self._path = []
-        self.clear()
-        canvas._root().tkraise()
-
-    def clear(self):
-        """ Clear the screen. The turtle does not move.
-
-        Example:
-        >>> turtle.clear()
-        """
-        self.fill(0)
-        canvas = self._canvas
-        items = self._items
-        self._items = []
-        for item in items:
-            canvas.delete(item)
-        self._delete_turtle()
-        self._draw_turtle()
-
-    def tracer(self, flag):
-        """ Set tracing on if flag is True, and off if it is False.
-        Tracing means line are drawn more slowly, with an
-        animation of an arrow along the line.
-
-        Example:
-        >>> turtle.tracer(False)   # turns off Tracer
-        """
-        self._tracing = flag
-        if not self._tracing:
-            self._delete_turtle()
-        self._draw_turtle()
-
-    def forward(self, distance):
-        """ Go forward distance steps.
-
-        Example:
-        >>> turtle.position()
-        [0.0, 0.0]
-        >>> turtle.forward(25)
-        >>> turtle.position()
-        [25.0, 0.0]
-        >>> turtle.forward(-75)
-        >>> turtle.position()
-        [-50.0, 0.0]
-        """
-        x0, y0 = start = self._position
-        x1 = x0 + distance * cos(self._angle*self._invradian)
-        y1 = y0 - distance * sin(self._angle*self._invradian)
-        self._goto(x1, y1)
-
-    def backward(self, distance):
-        """ Go backwards distance steps.
-
-        The turtle's heading does not change.
-
-        Example:
-        >>> turtle.position()
-        [0.0, 0.0]
-        >>> turtle.backward(30)
-        >>> turtle.position()
-        [-30.0, 0.0]
-        """
-        self.forward(-distance)
-
-    def left(self, angle):
-        """ Turn left angle units (units are by default degrees,
-        but can be set via the degrees() and radians() functions.)
-
-        When viewed from above, the turning happens in-place around
-        its front tip.
-
-        Example:
-        >>> turtle.heading()
-        22
-        >>> turtle.left(45)
-        >>> turtle.heading()
-        67.0
-        """
-        self._angle = (self._angle + angle) % self._fullcircle
-        self._draw_turtle()
-
-    def right(self, angle):
-        """ Turn right angle units (units are by default degrees,
-        but can be set via the degrees() and radians() functions.)
-
-        When viewed from above, the turning happens in-place around
-        its front tip.
-
-        Example:
-        >>> turtle.heading()
-        22
-        >>> turtle.right(45)
-        >>> turtle.heading()
-        337.0
-        """
-        self.left(-angle)
-
-    def up(self):
-        """ Pull the pen up -- no drawing when moving.
-
-        Example:
-        >>> turtle.up()
-        """
-        self._drawing = 0
-
-    def down(self):
-        """ Put the pen down -- draw when moving.
-
-        Example:
-        >>> turtle.down()
-        """
-        self._drawing = 1
-
-    def width(self, width):
-        """ Set the line to thickness to width.
-
-        Example:
-        >>> turtle.width(10)
-        """
-        self._width = float(width)
-
-    def color(self, *args):
-        """ Set the pen color.
-
-        Three input formats are allowed:
-
-            color(s)
-            s is a Tk specification string, such as "red" or "yellow"
-
-            color((r, g, b))
-            *a tuple* of r, g, and b, which represent, an RGB color,
-            and each of r, g, and b are in the range [0..1]
-
-            color(r, g, b)
-            r, g, and b represent an RGB color, and each of r, g, and b
-            are in the range [0..1]
-
-        Example:
-
-        >>> turtle.color('brown')
-        >>> tup = (0.2, 0.8, 0.55)
-        >>> turtle.color(tup)
-        >>> turtle.color(0, .5, 0)
-        """
-        if not args:
-            raise Error, "no color arguments"
-        if len(args) == 1:
-            color = args[0]
-            if type(color) == type(""):
-                # Test the color first
-                try:
-                    id = self._canvas.create_line(0, 0, 0, 0, fill=color)
-                except tkinter.TclError:
-                    raise Error, "bad color string: %r" % (color,)
-                self._set_color(color)
-                return
-            try:
-                r, g, b = color
-            except:
-                raise Error, "bad color sequence: %r" % (color,)
-        else:
-            try:
-                r, g, b = args
-            except:
-                raise Error, "bad color arguments: %r" % (args,)
-        assert 0 <= r <= 1
-        assert 0 <= g <= 1
-        assert 0 <= b <= 1
-        x = 255.0
-        y = 0.5
-        self._set_color("#%02x%02x%02x" % (int(r*x+y), int(g*x+y), int(b*x+y)))
-
-    def _set_color(self,color):
-        self._color = color
-        self._draw_turtle()
-
-    def write(self, text, move=False):
-        """ Write text at the current pen position.
-
-        If move is true, the pen is moved to the bottom-right corner
-        of the text. By default, move is False.
-
-        Example:
-        >>> turtle.write('The race is on!')
-        >>> turtle.write('Home = (0, 0)', True)
-        """
-        x, y  = self._position
-        x = x-1 # correction -- calibrated for Windows
-        item = self._canvas.create_text(x, y,
-                                        text=str(text), anchor="sw",
-                                        fill=self._color)
-        self._items.append(item)
-        if move:
-            x0, y0, x1, y1 = self._canvas.bbox(item)
-            self._goto(x1, y1)
-        self._draw_turtle()
-
-    def fill(self, flag):
-        """ Call fill(1) before drawing the shape you
-         want to fill, and fill(0) when done.
-
-        Example:
-        >>> turtle.fill(1)
-        >>> turtle.forward(100)
-        >>> turtle.left(90)
-        >>> turtle.forward(100)
-        >>> turtle.left(90)
-        >>> turtle.forward(100)
-        >>> turtle.left(90)
-        >>> turtle.forward(100)
-        >>> turtle.fill(0)
-        """
-        if self._filling:
-            path = tuple(self._path)
-            smooth = self._filling < 0
-            if len(path) > 2:
-                item = self._canvas._create('polygon', path,
-                                            {'fill': self._color,
-                                             'smooth': smooth})
-                self._items.append(item)
-        self._path = []
-        self._filling = flag
-        if flag:
-            self._path.append(self._position)
-
-    def begin_fill(self):
-        """ Called just before drawing a shape to be filled.
-            Must eventually be followed by a corresponding end_fill() call.
-            Otherwise it will be ignored.
-
-        Example:
-        >>> turtle.begin_fill()
-        >>> turtle.forward(100)
-        >>> turtle.left(90)
-        >>> turtle.forward(100)
-        >>> turtle.left(90)
-        >>> turtle.forward(100)
-        >>> turtle.left(90)
-        >>> turtle.forward(100)
-        >>> turtle.end_fill()
-        """
-        self._path = [self._position]
-        self._filling = 1
-
-    def end_fill(self):
-        """ Called after drawing a shape to be filled.
-
-        Example:
-        >>> turtle.begin_fill()
-        >>> turtle.forward(100)
-        >>> turtle.left(90)
-        >>> turtle.forward(100)
-        >>> turtle.left(90)
-        >>> turtle.forward(100)
-        >>> turtle.left(90)
-        >>> turtle.forward(100)
-        >>> turtle.end_fill()
-        """
-        self.fill(0)
-
-    def circle(self, radius, extent = None):
-        """ Draw a circle with given radius.
-        The center is radius units left of the turtle; extent
-        determines which part of the circle is drawn. If not given,
-        the entire circle is drawn.
-
-        If extent is not a full circle, one endpoint of the arc is the
-        current pen position. The arc is drawn in a counter clockwise
-        direction if radius is positive, otherwise in a clockwise
-        direction. In the process, the direction of the turtle is
-        changed by the amount of the extent.
-
-        >>> turtle.circle(50)
-        >>> turtle.circle(120, 180)  # half a circle
-        """
-        if extent is None:
-            extent = self._fullcircle
-        frac = abs(extent)/self._fullcircle
-        steps = 1+int(min(11+abs(radius)/6.0, 59.0)*frac)
-        w = 1.0 * extent / steps
-        w2 = 0.5 * w
-        l = 2.0 * radius * sin(w2*self._invradian)
-        if radius < 0:
-            l, w, w2 = -l, -w, -w2
-        self.left(w2)
-        for i in range(steps):
-            self.forward(l)
-            self.left(w)
-        self.right(w2)
-
-    def heading(self):
-        """ Return the turtle's current heading.
-
-        Example:
-        >>> turtle.heading()
-        67.0
-        """
-        return self._angle
-
-    def setheading(self, angle):
-        """ Set the turtle facing the given angle.
-
-        Here are some common directions in degrees:
-
-           0 - east
-          90 - north
-         180 - west
-         270 - south
-
-        Example:
-        >>> turtle.setheading(90)
-        >>> turtle.heading()
-        90
-        >>> turtle.setheading(128)
-        >>> turtle.heading()
-        128
-        """
-        self._angle = angle
-        self._draw_turtle()
-
-    def window_width(self):
-        """ Returns the width of the turtle window.
-
-        Example:
-        >>> turtle.window_width()
-        640
-        """
-        width = self._canvas.winfo_width()
-        if width <= 1:  # the window isn't managed by a geometry manager
-            width = self._canvas['width']
-        return width
-
-    def window_height(self):
-        """ Return the height of the turtle window.
-
-        Example:
-        >>> turtle.window_height()
-        768
-        """
-        height = self._canvas.winfo_height()
-        if height <= 1: # the window isn't managed by a geometry manager
-            height = self._canvas['height']
-        return height
-
-    def position(self):
-        """ Return the current (x, y) location of the turtle.
-
-        Example:
-        >>> turtle.position()
-        [0.0, 240.0]
-        """
-        x0, y0 = self._origin
-        x1, y1 = self._position
-        return [x1-x0, -y1+y0]
-
-    def setx(self, xpos):
-        """ Set the turtle's x coordinate to be xpos.
-
-        Example:
-        >>> turtle.position()
-        [10.0, 240.0]
-        >>> turtle.setx(10)
-        >>> turtle.position()
-        [10.0, 240.0]
-        """
-        x0, y0 = self._origin
-        x1, y1 = self._position
-        self._goto(x0+xpos, y1)
-
-    def sety(self, ypos):
-        """ Set the turtle's y coordinate to be ypos.
-
-        Example:
-        >>> turtle.position()
-        [0.0, 0.0]
-        >>> turtle.sety(-22)
-        >>> turtle.position()
-        [0.0, -22.0]
-        """
-        x0, y0 = self._origin
-        x1, y1 = self._position
-        self._goto(x1, y0-ypos)
-
-    def towards(self, *args):
-        """Returs the angle, which corresponds to the line
-        from turtle-position to point (x,y).
-
-        Argument can be two coordinates or one pair of coordinates
-        or a RawPen/Pen instance.
-
-        Example:
-        >>> turtle.position()
-        [10.0, 10.0]
-        >>> turtle.towards(0,0)
-        225.0
-        """
-        if len(args) == 2:
-            x, y = args
-        else:
-            arg = args[0]
-            if isinstance(arg, RawPen):
-                x, y = arg.position()
-            else:
-                x, y = arg
-        x0, y0 = self.position()
-        dx = x - x0
-        dy = y - y0
-        return (atan2(dy,dx) / self._invradian) % self._fullcircle
-
-    def goto(self, *args):
-        """ Go to the given point.
-
-        If the pen is down, then a line will be drawn. The turtle's
-        orientation does not change.
-
-        Two input formats are accepted:
-
-           goto(x, y)
-           go to point (x, y)
-
-           goto((x, y))
-           go to point (x, y)
-
-        Example:
-        >>> turtle.position()
-        [0.0, 0.0]
-        >>> turtle.goto(50, -45)
-        >>> turtle.position()
-        [50.0, -45.0]
-        """
-        if len(args) == 1:
-            try:
-                x, y = args[0]
-            except:
-                raise Error, "bad point argument: %r" % (args[0],)
-        else:
-            try:
-                x, y = args
-            except:
-                raise Error, "bad coordinates: %r" % (args[0],)
-        x0, y0 = self._origin
-        self._goto(x0+x, y0-y)
-
-    def _goto(self, x1, y1):
-        x0, y0 = self._position
-        self._position = map(float, (x1, y1))
-        if self._filling:
-            self._path.append(self._position)
-        if self._drawing:
-            if self._tracing:
-                dx = float(x1 - x0)
-                dy = float(y1 - y0)
-                distance = hypot(dx, dy)
-                nhops = int(distance)
-                item = self._canvas.create_line(x0, y0, x0, y0,
-                                                width=self._width,
-                                                capstyle="round",
-                                                fill=self._color)
-                try:
-                    for i in range(1, 1+nhops):
-                        x, y = x0 + dx*i/nhops, y0 + dy*i/nhops
-                        self._canvas.coords(item, x0, y0, x, y)
-                        self._draw_turtle((x,y))
-                        self._canvas.update()
-                        self._canvas.after(self._delay)
-                    # in case nhops==0
-                    self._canvas.coords(item, x0, y0, x1, y1)
-                    self._canvas.itemconfigure(item, arrow="none")
-                except tkinter.TclError:
-                    # Probably the window was closed!
-                    return
-            else:
-                item = self._canvas.create_line(x0, y0, x1, y1,
-                                                width=self._width,
-                                                capstyle="round",
-                                                fill=self._color)
-            self._items.append(item)
-        self._draw_turtle()
-
-    def speed(self, speed):
-        """ Set the turtle's speed.
-
-        speed must one of these five strings:
-
-            'fastest' is a 0 ms delay
-            'fast' is a 5 ms delay
-            'normal' is a 10 ms delay
-            'slow' is a 15 ms delay
-            'slowest' is a 20 ms delay
-
-         Example:
-         >>> turtle.speed('slow')
-        """
-        try:
-            speed = speed.strip().lower()
-            self._delay = speeds.index(speed) * 5
-        except:
-            raise ValueError("%r is not a valid speed. speed must be "
-                             "one of %s" % (speed, speeds))
-
-
-    def delay(self, delay):
-        """ Set the drawing delay in milliseconds.
-
-        This is intended to allow finer control of the drawing speed
-        than the speed() method
-
-        Example:
-        >>> turtle.delay(15)
-        """
-        if int(delay) < 0:
-            raise ValueError("delay must be greater than or equal to 0")
-        self._delay = int(delay)
-
-    def _draw_turtle(self, position=[]):
-        if not self._tracing:
-            self._canvas.update()
-            return
-        if position == []:
-            position = self._position
-        x,y = position
-        distance = 8
-        dx = distance * cos(self._angle*self._invradian)
-        dy = distance * sin(self._angle*self._invradian)
-        self._delete_turtle()
-        self._arrow = self._canvas.create_line(x-dx,y+dy,x,y,
-                                          width=self._width,
-                                          arrow="last",
-                                          capstyle="round",
-                                          fill=self._color)
-        self._canvas.update()
-
-    def _delete_turtle(self):
-        if self._arrow != 0:
-            self._canvas.delete(self._arrow)
-            self._arrow = 0
-
-
-_root = None
-_canvas = None
-_pen = None
-_width = 0.50                  # 50% of window width
-_height = 0.75                 # 75% of window height
-_startx = None
-_starty = None
-_title = "Turtle Graphics"     # default title
-
-class Pen(RawPen):
-
-    def __init__(self):
-        global _root, _canvas
-        if _root is None:
-            _root = tkinter.Tk()
-            _root.wm_protocol("WM_DELETE_WINDOW", self._destroy)
-            _root.title(_title)
-
-        if _canvas is None:
-            # XXX Should have scroll bars
-            _canvas = tkinter.Canvas(_root, background="white")
-            _canvas.pack(expand=1, fill="both")
-
-            setup(width=_width, height= _height, startx=_startx, starty=_starty)
-
-        RawPen.__init__(self, _canvas)
-
-    def _destroy(self):
-        global _root, _canvas, _pen
-        root = self._canvas._root()
-        if root is _root:
-            _pen = None
-            _root = None
-            _canvas = None
-        root.destroy()
-
-def _getpen():
-    global _pen
-    if not _pen:
-        _pen = Pen()
-    return _pen
-
-class Turtle(Pen):
-    pass
-
-"""For documentation of the following functions see
-   the RawPen methods with the same names
-"""
-
-def degrees(): _getpen().degrees()
-def radians(): _getpen().radians()
-def reset(): _getpen().reset()
-def clear(): _getpen().clear()
-def tracer(flag): _getpen().tracer(flag)
-def forward(distance): _getpen().forward(distance)
-def backward(distance): _getpen().backward(distance)
-def left(angle): _getpen().left(angle)
-def right(angle): _getpen().right(angle)
-def up(): _getpen().up()
-def down(): _getpen().down()
-def width(width): _getpen().width(width)
-def color(*args): _getpen().color(*args)
-def write(arg, move=0): _getpen().write(arg, move)
-def fill(flag): _getpen().fill(flag)
-def begin_fill(): _getpen().begin_fill()
-def end_fill(): _getpen().end_fill()
-def circle(radius, extent=None): _getpen().circle(radius, extent)
-def goto(*args): _getpen().goto(*args)
-def heading(): return _getpen().heading()
-def setheading(angle): _getpen().setheading(angle)
-def position(): return _getpen().position()
-def window_width(): return _getpen().window_width()
-def window_height(): return _getpen().window_height()
-def setx(xpos): _getpen().setx(xpos)
-def sety(ypos): _getpen().sety(ypos)
-def towards(*args): return _getpen().towards(*args)
-
-def done(): _root.mainloop()
-def delay(delay): return _getpen().delay(delay)
-def speed(speed): return _getpen().speed(speed)
-
-for methodname in dir(RawPen):
-    """ copies RawPen docstrings to module functions of same name """
-    if not methodname.startswith("_"):
-        eval(methodname).__doc__ = RawPen.__dict__[methodname].__doc__
-
-
-def setup(**geometry):
-    """ Sets the size and position of the main window.
-
-    Keywords are width, height, startx and starty:
-
-    width: either a size in pixels or a fraction of the screen.
-      Default is 50% of screen.
-    height: either the height in pixels or a fraction of the screen.
-      Default is 75% of screen.
-
-    Setting either width or height to None before drawing will force
-      use of default geometry as in older versions of turtle.py
-
-    startx: starting position in pixels from the left edge of the screen.
-      Default is to center window. Setting startx to None is the default
-      and centers window horizontally on screen.
-
-    starty: starting position in pixels from the top edge of the screen.
-      Default is to center window. Setting starty to None is the default
-      and centers window vertically on screen.
-
-    Examples:
-    >>> setup (width=200, height=200, startx=0, starty=0)
-
-    sets window to 200x200 pixels, in upper left of screen
-
-    >>> setup(width=.75, height=0.5, startx=None, starty=None)
-
-    sets window to 75% of screen by 50% of screen and centers
-
-    >>> setup(width=None)
-
-    forces use of default geometry as in older versions of turtle.py
-    """
-
-    global _width, _height, _startx, _starty
-
-    width = geometry.get('width',_width)
-    if width >= 0 or width is None:
-        _width = width
-    else:
-        raise ValueError, "width can not be less than 0"
-
-    height = geometry.get('height',_height)
-    if height >= 0 or height is None:
-        _height = height
-    else:
-        raise ValueError, "height can not be less than 0"
-
-    startx = geometry.get('startx', _startx)
-    if startx >= 0 or startx is None:
-        _startx = _startx
-    else:
-        raise ValueError, "startx can not be less than 0"
-
-    starty = geometry.get('starty', _starty)
-    if starty >= 0 or starty is None:
-        _starty = starty
-    else:
-        raise ValueError, "startx can not be less than 0"
-
-
-    if _root and _width and _height:
-        if 0 < _width <= 1:
-            _width = _root.winfo_screenwidth() * +width
-        if 0 < _height <= 1:
-            _height = _root.winfo_screenheight() * _height
-
-        # center window on screen
-        if _startx is None:
-            _startx = (_root.winfo_screenwidth() - _width) / 2
-
-        if _starty is None:
-            _starty = (_root.winfo_screenheight() - _height) / 2
-
-        _root.geometry("%dx%d+%d+%d" % (_width, _height, _startx, _starty))
-
-def title(title):
-    """Set the window title.
-
-    By default this is set to 'Turtle Graphics'
-
-    Example:
-    >>> title("My Window")
-    """
-
-    global _title
-    _title = title
-
-def demo():
-    reset()
-    tracer(1)
-    up()
-    backward(100)
-    down()
-    # draw 3 squares; the last filled
-    width(3)
-    for i in range(3):
-        if i == 2:
-            fill(1)
-        for j in range(4):
-            forward(20)
-            left(90)
-        if i == 2:
-            color("maroon")
-            fill(0)
-        up()
-        forward(30)
-        down()
-    width(1)
-    color("black")
-    # move out of the way
-    tracer(0)
-    up()
-    right(90)
-    forward(100)
-    right(90)
-    forward(100)
-    right(180)
-    down()
-    # some text
-    write("startstart", 1)
-    write("start", 1)
-    color("red")
-    # staircase
-    for i in range(5):
-        forward(20)
-        left(90)
-        forward(20)
-        right(90)
-    # filled staircase
-    fill(1)
-    for i in range(5):
-        forward(20)
-        left(90)
-        forward(20)
-        right(90)
-    fill(0)
-    tracer(1)
-    # more text
-    write("end")
-
-def demo2():
-    # exercises some new and improved features
-    speed('fast')
-    width(3)
-
-    # draw a segmented half-circle
-    setheading(towards(0,0))
-    x,y = position()
-    r = (x**2+y**2)**.5/2.0
-    right(90)
-    pendown = True
-    for i in range(18):
-        if pendown:
-            up()
-            pendown = False
-        else:
-            down()
-            pendown = True
-        circle(r,10)
-    sleep(2)
-
-    reset()
-    left(90)
-
-    # draw a series of triangles
-    l = 10
-    color("green")
-    width(3)
-    left(180)
-    sp = 5
-    for i in range(-2,16):
-        if i > 0:
-            color(1.0-0.05*i,0,0.05*i)
-            fill(1)
-            color("green")
-        for j in range(3):
-            forward(l)
-            left(120)
-        l += 10
-        left(15)
-        if sp > 0:
-            sp = sp-1
-            speed(speeds[sp])
-    color(0.25,0,0.75)
-    fill(0)
-
-    # draw and fill a concave shape
-    left(120)
-    up()
-    forward(70)
-    right(30)
-    down()
-    color("red")
-    speed("fastest")
-    fill(1)
-    for i in range(4):
-        circle(50,90)
-        right(90)
-        forward(30)
-        right(90)
-    color("yellow")
-    fill(0)
-    left(90)
-    up()
-    forward(30)
-    down();
-
-    color("red")
-
-    # create a second turtle and make the original pursue and catch it
-    turtle=Turtle()
-    turtle.reset()
-    turtle.left(90)
-    turtle.speed('normal')
-    turtle.up()
-    turtle.goto(280,40)
-    turtle.left(24)
-    turtle.down()
-    turtle.speed('fast')
-    turtle.color("blue")
-    turtle.width(2)
-    speed('fastest')
-
-    # turn default turtle towards new turtle object
-    setheading(towards(turtle))
-    while ( abs(position()[0]-turtle.position()[0])>4 or
-            abs(position()[1]-turtle.position()[1])>4):
-        turtle.forward(3.5)
-        turtle.left(0.6)
-        # turn default turtle towards new turtle object
-        setheading(towards(turtle))
-        forward(4)
-    write("CAUGHT! ", move=True)
-
-
-
-if __name__ == '__main__':
-    demo()
-    sleep(3)
-    demo2()
-    done()