Try this function. Make sure you actually have defined the hitbox with SPCOL first. DEF SHOW_HITBOX ID%, COL% VAR X#,Y#,W#,H#,XX#,YY#,S%,SX#=1,SY%=# SPOFS ID% OUT XX#,YY# SPCOL ID% OUT X#,Y#,W#,H#,S% IF S% THEN SPSCALE ID% OUT SX#,SY# GBOX XX#+X#*SX#,YY#+Y#*SY#,XX#+(X#*SX#+W#*SX#-1),YY#+(Y#*SY#+H#*SY#-1),COL% END Usage: SHOW_HITBOX spriteID, color