@1
MOV UP, ACC
MOV ACC, DOWN

@5
MOV UP, DOWN

@8
L: MOV UP, ACC
NEG
ADD 18
MOV ACC, RIGHT
NEG
ADD 18
JEZ Z
P: SWP
MOV ACC, RIGHT
SWP
SUB 1
JNZ P
Z: SWP
ADD 1
SWP

@9
L: MOV LEFT, ACC
SAV
NEG
ADD 18
JEZ L
P: MOV LEFT, DOWN
SWP
MOV ACC, DOWN
MOV 3, DOWN
MOV -1, DOWN
ADD 1
SWP
SUB 1
JNZ P
