Why call it do_the_flick if you don't flick (#16853)

code/game/objects/structures/false_walls.dm

@@ -94,9 +94,9 @@
 	if(density)
 		smooth = SMOOTH_FALSE
 		clear_smooth_overlays()
-		icon_state = "fwall_opening"
+		flick("fwall_opening", src)
 	else
-		icon_state = "fwall_closing"
+		flick("fwall_closing", src)
 
 /obj/structure/falsewall/update_icon()
 	if(density)
@@ -297,6 +297,7 @@
 /obj/structure/falsewall/sandstone
 	name = "sandstone wall"
 	desc = "A wall with sandstone plating."
+	icon = 'icons/turf/walls/sandstone_wall.dmi'
 	icon_state = "sandstone"
 	mineral = /obj/item/stack/sheet/mineral/sandstone
 	walltype = /turf/simulated/wall/mineral/sandstone