PSHI 0        ; Load a zero onto the stack
  POP  R        ; and store it to the R register.


LOOP:           ; Label of start of loop.
  PUSH R        ; Load current R.
  PSHI 100      ; Load the constant 100.
  ADD           ; Add 'em together.
  POP  R        ; Store back to R.

LOOK:           ; Look at target.
  PUSH R        ; Load current R.
  POP  RADAR    ; Move radar turret.
  PUSH RADAR    ; Load target distance.
  PSHI 0        ; Now, test to see if we're
  JLT  LOOP     ; looking at a wall (loop)
  ; or a droid (shoot).

SHOOT:          ; Shoot the bleeper.
  PUSH R        ; Load current angle.
  POP  TURRET   ; Move gun turret around.
  PUSH TURRET   ; Load current turret temp.
  PSHI 100      ; Load max shoot temp.
  JGT  LOOK     ; Loop if too hot.
  PUSH RADAR    ; Load the distance again.
  POP  SHOT     ; Shoot the gun.
  JMP  LOOK     ; Go back and scan again.