@0


@1
   SUB UP

L: ADD 18
   MOV ACC ANY
   SUB 17
   JEZ Z
   MOV 0   LAST
   JMP L

Z: MOV 1   ANY

@2
MOV LEFT ANY
ADD LEFT
MOV ACC  LAST

@3


@4


@5


@6
MOV UP DOWN

@7


@8


@9
MOV LAST DOWN
MOV ANY  DOWN
MOV 3    DOWN
MOV -1   DOWN

@10