@1
MOV UP, DOWN

@2
MOV UP, DOWN

@4
S: MOV UP, ACC
SAV
MOV RIGHT, ACC
L: JEZ S
SWP
MOV ACC, RIGHT
SWP
SUB 1
JMP L

@5
S: MOV UP, ACC
SAV
MOV ACC, LEFT
MOV 0, ACC
L: SWP
JEZ D
SUB 1
SWP
ADD LEFT
JMP L
D: SWP
MOV ACC, DOWN

@7
MOV UP, DOWN
