@0 @1 SUB 8 SAV ADD UP MOV ACC DOWN SWP @2 SUB 8 SAV ADD UP MOV ACC DOWN SWP @3 @4 MOV UP RIGHT @5 MOV UP ACC JLZ G MOV LEFT ACC JGZ L MOV 0 DOWN JRO RIGHT G:MOV LEFT NIL L: SUB RIGHT MOV ACC DOWN @6 SUB 8 MOV ACC LEFT @7 MOV UP DOWN @8