@1
MOV UP, ACC
MOV UP, DOWN
SUB 1
JEZ E
P: MOV -1, DOWN
SUB 1
JGZ P
E: MOV -2, DOWN

@5
S: MOV UP, ACC
P: MOV ACC, RIGHT
JRO UP

@6
MOV LEFT, DOWN

@10
MOV 0, DOWN
SWP
MOV ACC, DOWN
ADD 1
SWP
MOV 30, ACC
P: MOV UP, DOWN
SUB 1
JNZ P
MOV -1, DOWN
