diff --git a/draw.py b/draw.py
index 0d9e31e..ac8ef12 100644
--- a/draw.py
+++ b/draw.py
@@ -12,7 +12,7 @@
 
 turtle.tracer(50000, delay=0)
 turtle.register_shape("dot", ((-3,-3), (-3,3), (3,3), (3,-3)))
-turtle.register_shape("tri", ((-3, -2), (0, 3), (3, -2)))
+turtle.register_shape("tri", ((-3, -2), (0, 3), (3, -2), (0, 0)))
 turtle.speed(0)
 turtle.title("Poor robbie is lost")