partial_hud_reset.asm

;; step 1. set myLives to 3
LDA #$03
STA myLives

;; step 2. set each digit of myScore to 0
TXA
PHA ;; backup X register
LDX #$03 ;; countdown 3, 2, 1, 0
-loop
LDA #$00
STA myScore,x
DEX
BMI +done
JMP -loop
+done
PLA
TAX ;; restore X register