Thanks, it worked! Yeah it's still in progress, I just started coding it yesterday.

Hi, I've never made a forum post so if I do/say something that I'm not supposed to or if I'm not clear enough, please forgive me. What I'm trying to do is to place "wires" in the map (which is a grid of 16x16px). I tried to make it impossible to place a wire above another wire, but my code...