update pathnames
diff --git a/Demo/tkinter/guido/electrons.py b/Demo/tkinter/guido/electrons.py
index 56f33f4..5f6c8b5 100755
--- a/Demo/tkinter/guido/electrons.py
+++ b/Demo/tkinter/guido/electrons.py
@@ -1,4 +1,5 @@
-#!/ufs/guido/bin/sgi/tkpython
+#! /usr/local/bin/python
+
 # Simulate "electrons" migrating across the screen.  
 # An optional bitmap file in can be in the background.
 #