diff --git a/scripts/demo1.py b/scripts/demo1.py
index 2e7ae70..7e3a5c0 100755
--- a/scripts/demo1.py
+++ b/scripts/demo1.py
@@ -31,13 +31,14 @@ origin_y = 0
 current_x = 0
 current_y = 0
 
-def rubberband_rectangle(x, y, down, up)
+def rubberband_rectangle(x, y, down, up):
+	global current_x, current_y
 	hdc.text_color = YELLOW
 	hdc.rop2 = upiwin.R2_XORPEN
 	if not down:
 		hdc.rectangle(min(origin_x, current_x), min(origin_y, current_y), max(origin_x, current_x), max(origin_y, current_y))
-	current_x = x;
-	current_y = y;
+	current_x = x
+	current_y = y
 	if not up:
 		hdc.rectangle(min(origin_x, current_x), min(origin_y, current_y), max(origin_x, current_x), max(origin_y, current_y))
 
@@ -49,9 +50,10 @@ def rubberband_rectangle(x, y, down, up)
 # --- Message handlers ---
 
 def on_touchdown(x, y):
+	global origin_x, origin_y
 	if point_in_rect(drawing_rect, x, y):
-		origin_x = x;
-		origin_y = y;
+		origin_x = x
+		origin_y = y
 		rubberband_rectangle(x, y, True, False)
 		
 def on_touchmove(x, y):