@0
   MOV UP DOWN
   MOV UP NIL
S: MOV UP DOWN
   JGZ S
   ADD 1

@1
   MOV UP NIL
   MOV UP ACC
   JEZ E
   MOV UP ACC
   MOV 2 DOWN
E: MOV UP NIL
   JNZ 1

0: MOV UP ACC
   JEZ U

   MOV 2 DOWN
1: MOV UP ACC
U: JEZ 0
   JMP 1

@2
   MOV UP NIL
   MOV UP DOWN
   MOV UP NIL
   MOV UP NIL

0: MOV UP ACC
   JEZ U

   MOV 3 DOWN
1: MOV UP ACC
U: JEZ 0
   JMP 1

@3
   MOV UP NIL

S: MOV UP DOWN
   JGZ S

   MOV UP DOWN
   ADD 1
   MOV UP DOWN
   MOV UP NIL

@4
   JRO UP
   MOV 1 RIGHT

1: MOV UP ACC
   JNZ 1

@5
 MOV ANY DOWN

@6
 MOV ANY ANY

@7
   JRO UP
   MOV 4 LEFT

1: MOV UP ACC
   JNZ 1

@8
 MOV UP RIGHT

@9
G:MOV ANY DOWN
JGZ G
MOV LEFT  NIL!

ADD 1
MOV ANY DOWN
NOP
MOV ANY DOWN
NOP
MOV ANY DOWN
MOV   0 DOWN
MOV   0 DOWN

@10
 MOV 0 LEFT