@1
MOV UP, DOWN

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

@6
MOV 17, ACC
SAV
MOV LEFT, ACC
LOOP: SWP
MOV ACC, DOWN
SUB 1
SWP
SUB 1
JGZ LOOP

@8
MOV UP, ACC
LOOP: SWP
MOV ACC, RIGHT
SWP
SUB 1
JGZ LOOP
SWP
ADD 1
SWP

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