@1
MOV UP, DOWN

@5
MOV UP, ACC
MOV ACC, DOWN
MOV ACC, RIGHT

@6
MOV LEFT, ACC
L: SWP
MOV ACC, DOWN
SWP
SUB 1
JGZ L
SWP
ADD 1
SWP

@8
MOV UP, ACC
NEG
L: ADD 18
MOV ACC, RIGHT
SUB 17
JLZ L

@9
MOV UP, DOWN
MOV LEFT, DOWN
MOV 3, DOWN
MOV -1, DOWN
