I'm making my own collision script, but I can't make the object I touched as an argument. I even tried to do it with one object but it won't work. Mario just falls through the ground. Here's the code I used: Script: [code] bleft = obj_solidground.bbox_left btop = obj_solidground.bbox_top bright = obj_solidground.bbox_right bbottom = obj_solidground.bbox_bottom if argument0 > bright or argument3 < bleft or argument1 > bbottom or argument4 < btop return true; else return false; [/code] Mario step event [code] if col_rect(bbox_left,bbox_bottom,bbox_right,bbox_bottom+2) and yspeed = 0 if xspeed = 0 state = 0 else state = 1 else state = 2 y += yspeed yspeed = min(yspeed+grav,4) if col_rect(bbox_left,bbox_bottom,bbox_right,bbox_bottom+2) { topblock = collision_rectangle(bbox_left,bbox_bottom,bbox_right,bbox_bottom+2,obj_solidground,1,1) if not yspeed < 0 { y = topblock.bbox_top-31 yspeed = 0 grav = 0 jumpnow = 0 } } else { if yspeed < -1 grav = 0.1 else grav = 0.3 } [/code] Help would greatly release my fangame early :D . EDIT: Anyone help me?