@0
 SUB 8

 MOV RIGHT LAST
 ADD RIGHT
 MOV ACC ANY
 ADD 2

G: SUB 1
  JGZ G

 MOV DOWN ACC

@1
 MOV UP LEFT
 MOV UP LEFT
 ADD LAST
 MOV ACC DOWN

 MOV UP ACC
 ADD 907
 MOV UP RIGHT
 SUB 998

 MOV ACC DOWN
JRO ANY

 SUB 998
 MOV ACC DOWN

@2
 MOV -4 ACC
 ADD LEFT
 JRO 3

G: MOV -1 LEFT
   SUB 1
  JGZ G

 MOV 1 LEFT
 MOV 998 LEFT

@3
 MOV 3 DOWN

@4
   MOV -7 ACC
E: MOV 0 LAST
   SUB UP

Z: MOV 7 UP
   MOV ACC ANY
   MOV UP ACC
  JEZ E

   SUB ACC
   MOV UP RIGHT
  JMP Z

@5
 ADD UP
 MOV ACC LAST
 MOV LEFT RIGHT

   ADD ANY
G: MOV ACC RIGHT
   MOV 0 ANY
   ADD UP
  JGZ G

 ADD 998
 MOV ACC RIGHT
 MOV LEFT RIGHT

@6
 SUB LEFT
 MOV -1 RIGHT
 MOV ACC RIGHT
 MOV LEFT RIGHT

@7
 MOV ANY DOWN

@8
L:ADD 8
MOV 0 UP
S: SUB 1!
MOV 0 LAST
MOV -1 ANY
MOV ACC RIGHT
MOV 0 RIGHT
JMP S

@9
 MOV LAST DOWN
 MOV ANY DOWN

@10
 MOV LAST LEFT
 MOV ANY LEFT