@0


@1
MOV UP RIGHT

@2
SUB 8

MOV LEFT DOWN
MOV UP   LAST

MOV ACC ANY

@3


@4


@5
MOV UP  ACC
MOV ACC LAST
MOV ACC ANY

@6


@7
   MOV LAST ACC
   ADD LAST
   JGZ O

   SUB LAST
   ADD LAST
   JGZ L

O: MOV ANY DOWN

   JRO UP
L: MOV 0 DOWN
   JRO UP

@8