@1
MOV UP RIGHT

@2
L: MOV UP ACC
SAV
SUB DOWN
JGZ N
MOV LEFT NIL
MOV DOWN NIL
JMP O
N: MOV LEFT ACC
SAV
SUB DOWN
JGZ O
MOV 0 DOWN
JMP L
O: SWP
MOV ACC DOWN

@5
MOV ACC UP
MOV ACC UP
ADD 8
MOV UP DOWN

@7
MOV UP DOWN
