@1
MOV UP, RIGHT

@2
L: MOV UP, ACC
JEZ Z
JGZ B
MOV LEFT, DOWN
MOV RIGHT, NIL
JMP L
B: MOV RIGHT, DOWN
MOV LEFT, NIL
JMP L
Z: MOV LEFT, ACC
ADD RIGHT
MOV ACC, DOWN

@3
MOV UP, LEFT

@6
MOV UP, DOWN

@9
MOV UP, DOWN
