grid question

Hello,
I'd like to make a 16x16 pixels grid that controls all my actors movement ! how can i do this?
if someone got a good script or if this has been already asked in a previous topic, let me know !
thanks by advance!!!!
I'd like to make a 16x16 pixels grid that controls all my actors movement ! how can i do this?
if someone got a good script or if this has been already asked in a previous topic, let me know !
thanks by advance!!!!