Agh, here it is again: DrawRowOfBlocks: ld a,(hl) ld b,8 DrawRowLoop: rra push af jr c,DrawBlock NoBlock: ld a,d add a,8 ld d,a jr AfterDraw DrawBlock: push bc push hl ld hl,Block call ZoomSprite pop hl pop bc AfterDraw: pop af djnz DrawRowLoop inc hl ld d,b inc e ld a,e cp 12 jr nz,DrawRowOfBlocks