@1
SAV
MOV ACC, RIGHT
SUB UP
JLZ P
MOV 999, ACC
P: MOV ACC, RIGHT
SWP
ADD 8

@2
L: MOV LEFT, ACC
MOV ACC, DOWN
MOV LEFT, DOWN
SUB UP
JLZ Q
MOV ACC, DOWN
JMP L
Q: MOV 999, DOWN

@5
MOV UP, ACC
SUB UP
SUB UP
ADD 999
MOV ACC, DOWN

@7
MOV UP, DOWN
