@0
## OPTIMIZED

@1
 MOV UP DOWN

@2


@3


@4
 MOV UP RIGHT

@5
 MOV 0 UP
FWD: MOV LEFT ACC
 MOV ACC UP
 JGZ FWD
 MOV UP NIL
REV: MOV UP ACC
 MOV ACC DOWN
 JGZ REV

@6


@7
 MOV UP DOWN

@8