@1
MOV UP, ACC
MOV ACC, RIGHT
L: MOV ACC, DOWN
SUB 2
JGZ L
MOV -999, DOWN

@2
MOV LEFT, ACC
SUB 1
JEZ E
L: MOV ACC, DOWN
SUB 2
JGZ L
E: MOV -999, DOWN

@4
L: ADD UP
JGZ L
ADD 999
ADD RIGHT
MOV ACC, DOWN
MOV 0, ACC

@5
L: ADD UP
JGZ L
ADD 999
MOV ACC, LEFT
MOV 0, ACC

@8
MOV UP, DOWN
