[RMXP] BOMB EXPLOSION

Hi makers, i want to create a system of Bomberman ( don't worry I'll not ask you the entire work for me) it's like this the hero use a botton to leave a bomb, then the hero will have to press the same boutton to explode the bomb, and if the hero is near the explosion it hurt him, so the explosion will be compared to the bomb of a tile, but my problem the bomb does not touch the hero with his explosion. :

I create the system, but i need help here is the programing :

http://www.megafileupload.com/97yM/BOMB.rar