@0
S: MOV UP, DOWN
L: MOV RIGHT, ACC
MOV ACC, DOWN
MOV ACC, DOWN
JGZ L

@1
MOV UP, ACC
JNZ N
MOV -999, ACC
N: MOV ACC, RIGHT
MOV ACC, LEFT
MOV ACC, DOWN
MOV RIGHT, DOWN
MOV ACC, RIGHT

@2
S: MOV UP, ACC
L: SUB LEFT
JLZ P
MOV 0, LEFT
JMP R
P: MOV ACC, LEFT
R: ADD LEFT
JGZ L

@3
S: MOV UP, ACC
L: SUB UP
JGZ P
MOV 0, RIGHT
JMP R
P: MOV ACC, RIGHT
R: ADD UP
JGZ L

@4
MOV UP, ACC
ADD UP
ADD LEFT
MOV ACC, DOWN

@8
MOV UP, DOWN
