@1
MOV UP, DOWN

@4
MOV UP, DOWN

@8
MOV UP, RIGHT

@9
A: MOV LEFT, ACC
JNZ N
MOV 0, DOWN
B: MOV LEFT, ACC
JNZ N
MOV 0, DOWN
C: MOV LEFT, ACC
JNZ N
MOV 1, DOWN
D: MOV LEFT, ACC
JNZ N
MOV 1, DOWN
JMP C
N: MOV 0, DOWN
