Krakout: Advance the 15-step golden-twinkle timer

B0AE: Advance the 15-step golden-twinkle timer

Advances the golden brick's idle-twinkle timer one step per brick-field sweep. It clears itself after 15 steps.
tick_golden_flash_timer	B0AE	LD A,(golden_flash_timer)	Timer idle – nothing to do
	B0B1	OR A
	B0B2	RET Z
	B0B3	INC A	Tick the timer one step.
	B0B4	LD (golden_flash_timer),A	Tick the timer one step.
	B0B7	CP $10	After its full span, wrap back to idle.
	B0B9	RET NZ
	B0BA	XOR A
	B0BB	LD (golden_flash_timer),A
	B0BE	RET

Routines