Edge Detection

Hello,

I want to detect edges of an actor, I downloaded the 'edge detection' behavior on StencylForge but I don't know what am I suppose to put in the "If not" block..

same problem here! S: any help!?

You can always take a look at my 5th tutorial for how to put in some edge detection by coding it yourself: http://www.kongregate.com/games/Abigayl/stencyl-tutorial-5-music-powerups-more