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#!/usr/bin/env python3
""" turtle-example-suite:
tdemo_paint.py
A simple eventdriven paint program
- use left mouse button to move turtle
- middle mouse button to change color
- right mouse button do turn filling on/off
-------------------------------------------
Play around by clicking into the canvas
using all three mouse buttons.
-------------------------------------------
To exit press STOP button
-------------------------------------------
"""
from turtle import *
def switchupdown(x=0, y=0):
if pen()["pendown"]:
end_fill()
up()
else:
down()
begin_fill()
def changecolor(x=0, y=0):
global colors
colors = colors[1:]+colors[:1]
color(colors[0])
def main():
global colors
shape("circle")
resizemode("user")
shapesize(.5)
width(3)
colors=["red", "green", "blue", "yellow"]
color(colors[0])
switchupdown()
onscreenclick(goto,1)
onscreenclick(changecolor,2)
onscreenclick(switchupdown,3)
return "EVENTLOOP"
if __name__ == "__main__":
msg = main()
print(msg)
mainloop()
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