Alternative grille sprite update (#32630)

* Update grille sprite

* Add damaged grille sprite

* Add 4 varients to the damaged grille

code/game/objects/structures/grille.dm

@@ -21,6 +21,24 @@
 	. = ..()
 	AddComponent(/datum/component/rad_insulation, RAD_NO_INSULATION)
 
+/obj/structure/grille/take_damage(damage_amount, damage_type = BRUTE, damage_flag = 0, sound_effect = 1, attack_dir)
+	. = ..()
+	update_icon()
+
+/obj/structure/grille/update_icon()
+	if(QDELETED(src))
+		return
+
+	var/ratio = obj_integrity / max_integrity
+	ratio = Ceiling(ratio*4) * 25
+
+	if(smooth)
+		queue_smooth(src)
+
+	if(ratio > 50)
+		return
+	icon_state = "grille50_[rand(0,3)]"
+
 /obj/structure/grille/examine(mob/user)
 	..()
 	if(anchored)