diff --git a/magnitest.p8 b/magnitest.p8
index 86b6475..4262c0e 100644
--- a/magnitest.p8
+++ b/magnitest.p8
@@ -80,6 +80,7 @@ cols = {
 }
 
 function _draw()
+ cls()
  camera(-63,-63)
  line(0,0,gdx/magnitude,gdy/magnitude,cols[magnitude] or 2)
  rectfill(0,0,gdx/magnitude,0,5)