; CENTER = 0
; IP = spiral_start

; The cube is pre-loaded with the 0-9 spiral pattern:
; 0,1,3,5,6,7,4,8,9 repeated 24 times across all 216 cells
; (27 phases × 8 steps = 216, with opcode 9 jumping back to 0)

while(true) {
  IP → spiral[0]     ; always starts at START (0)
  
  ; follow the path:
  spiral[1] → LOAD        ; (skipped if VM1 not used)
  spiral[3] → READ
  spiral[5] → PROC        ; ACC ⊕ CUBE[IP]
  spiral[6] → WAIT → CENTER++   ; increment center on every WAIT
  spiral[7] → WRITE
  spiral[4] → LOCK
  spiral[8] → UNLOCK
  spiral[9] → STOP → spiral[0]  ; jump back to START
}