SetHPPal::
; Set palette for hp bar pixel length e at hl.
	call GetHPPal
	ld [hl], d
	ret

GetHPPal::
; Get palette for hp bar pixel length e in d.
	ld d, HP_GREEN
	ld a, e
	cp (HP_BAR_LENGTH_PX * 50 / 100) ; 24
	ret nc
	inc d ; HP_YELLOW
	cp (HP_BAR_LENGTH_PX * 21 / 100) ; 10
	ret nc
	inc d ; HP_RED
	ret