Matt's examples
diff --git a/Demo/tkinter/matt/canvas-demo-simple.py b/Demo/tkinter/matt/canvas-demo-simple.py
new file mode 100644
index 0000000..c8ebfa7
--- /dev/null
+++ b/Demo/tkinter/matt/canvas-demo-simple.py
@@ -0,0 +1,30 @@
+from Tkinter import *
+
+# this program creates a canvas and puts a single polygon on the canvas
+
+class Test(Frame):
+    def printit(self):
+	print "hi"
+
+    def createWidgets(self):
+	self.QUIT = Button(self, {'text': 'QUIT', 
+				  'fg': 'red', 
+				  'command': self.quit})
+	self.QUIT.pack({'side': 'bottom', 'fill': 'both'})	
+
+	self.draw = Canvas(self, {"width" : "5i", "height" : "5i"})
+
+	# see the other demos for other ways of specifying coords for a polygon
+	self.draw.create_polygon("0i", "0i", "3i", "0i", "3i", "3i", "0i" , "3i")
+
+	self.draw.pack({'side': 'left'})
+
+
+    def __init__(self, master=None):
+	Frame.__init__(self, master)
+	Pack.config(self)
+	self.createWidgets()
+
+test = Test()
+
+test.mainloop()