@1
S: MOV RIGHT,ACC
JGZ Z
MOV UP,DOWN
JMP S
Z: MOV UP,NIL
MOV NIL,DOWN

@2
MOV UP,ACC
MOV ACC,LEFT
MOV ACC,RIGHT

@3
S: MOV LEFT,ACC
JLZ Z
MOV UP,DOWN
JMP S
Z: MOV UP,NIL
MOV NIL,DOWN

@5
MOV UP,RIGHT

@6
MOV LEFT,ACC
ADD RIGHT
MOV ACC,DOWN

@7
MOV UP,LEFT

@9
MOV UP,DOWN
