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-rw-r--r--library/demos/pendulum.tcl4
1 files changed, 3 insertions, 1 deletions
diff --git a/library/demos/pendulum.tcl b/library/demos/pendulum.tcl
index 7c5bd55..cb31b33 100644
--- a/library/demos/pendulum.tcl
+++ b/library/demos/pendulum.tcl
@@ -3,12 +3,14 @@
# This demonstration illustrates how Tcl/Tk can be used to construct
# simulations of physical systems.
#
-# RCS: @(#) $Id: pendulum.tcl,v 1.1 2004/11/07 22:41:11 dkf Exp $
+# RCS: @(#) $Id: pendulum.tcl,v 1.2 2004/12/21 11:56:35 dkf Exp $
if {![info exists widgetDemo]} {
error "This script should be run from the \"widget\" demo."
}
+package require Tk
+
set w .pendulum
catch {destroy $w}
toplevel $w