@0
   MOV UP    ACC
   JGZ B
   SWP
   MOV 0     RIGHT
   ADD 1
   MOV ACC   DOWN
A: JMP A
B: MOV ACC   RIGHT
   SWP
   ADD 1
   SAV

@1
   MOV UP    DOWN

@2
   MOV UP    RIGHT

@3
   MOV LEFT  ACC
   SAV
B: MOV UP    DOWN
   SUB 1
   JGZ B
C: MOV DOWN  ACC
   MOV ACC   RIGHT
   MOV ACC   UP
   JGZ C
   SWP
   SAV
   JMP B

@4
   MOV UP    ACC
   JEZ B
A: MOV LEFT  NIL
   SUB 1
   JGZ A
B: MOV LEFT  DOWN
C: MOV LEFT  ACC
   JGZ C

@5


@6


@7
   MOV UP    DOWN

@8