diff --git a/collisiontest.p8 b/collisiontest.p8
index e34cde9..be7652c 100644
--- a/collisiontest.p8
+++ b/collisiontest.p8
@@ -114,7 +114,7 @@ end
 function _draw()
  cls(0)
 	rect(bx0,by0,bx1,by1,6)
-	zot(lx1,ly1,0.75,lx1-lx0,ly1-ly0,10,9,8)
+	zot(lx1,ly1,0,lx1-lx0,ly1-ly0,10,9,8)
 	--line(lx0,ly0,lx1,ly1,2)
 	local cmin, cmax = collides()
 	if cmin then
@@ -145,12 +145,18 @@ function zot_one(x, y, r, ir, dx, dy, hot, warm)
  --line(x0,y0,x+rx,y+ry,hot)
 end
 
-function zot(x,y,r,dx,dy,hot,cold)
+function zot(x,y,r,dx,dy,hot,warm,cold)
  local x0,y0,sdx,sdy=x-dx,y-dy,sgn(dx),sgn(dy)
  local rx,ry=r*sdx,r*sdy
+ if cold then
+  rectfill(x0-rx,y0-ry,x0+rx,y0+ry,cold)
+  local sdxh,sdyh=sdx/2,sdy/2
+  line(x0-rx-sdxh,y0+ry+sdyh,x-rx,y+ry,cold)
+  line(x0+rx+sdxh,y0-ry-sdyh,x+rx,y-ry,cold)
+ end
  for i=-r,r do
-  line(x0+i*sdx,y0-ry,x+rx,y-i*sdy,cold)
-  line(x0-rx,y0+i*sdy,x-i*sdx,y+ry,cold)
+  line(x0+i*sdx,y0-ry,x+rx,y-i*sdy,warm)
+  line(x0-rx,y0+i*sdy,x-i*sdx,y+ry,warm)
  end
  for i=-r,r do
   line(x0,y0,x+rx,y-i*sdy,hot)