@1
MOV UP, DOWN

@4
START:
MOV UP, ACC
MOV ACC, DOWN
LOOP:
MOV ACC, DOWN
SUB 1
JNZ LOOP
JMP START

@8
START:
MOV UP, ACC
SAV
SUB ACC
ADD UP
SWP
SUB 1
JEZ DONE
SWP
JRO -5
DONE:
SWP
MOV ACC, DOWN
JMP START
