@0
MOV 8 ACC
I:MOV 0 LEFT
SUB 1
JGZ I
L:MOV UP DOWN
JMP L

@3
MOV RIGHT ACC
ADD 1
SAV
F:MOV UP DOWN
SUB 1
JGZ F
MOV DOWN RIGHT
MOV RIGHT DOWN
SWP
B:MOV DOWN UP
SUB 1
JGZ B

@4
S:MOV UP ACC
MOV UP LEFT
JEZ W
MOV LEFT ACC
MOV ACC DOWN
MOV ACC LEFT
JMP S
W:MOV LEFT NIL
MOV UP LEFT

@7
MOV UP DOWN
