@1
MOV UP ACC
MOV ACC RIGHT
JRO RIGHT

@2
MOV UP ACC
JEZ E
L: MOV LEFT DOWN
MOV -1 LEFT
SUB 1
JNZ L
E: MOV LEFT NIL
MOV -2 LEFT
MOV -999 DOWN

@5
L: ADD UP
JLZ E
JMP L
E: ADD 999
MOV ACC DOWN
MOV 0 ACC

@7
MOV UP DOWN
