Improve asteroid generation performance

code/game/objects/structures/banner.dm

@@ -0,0 +1,42 @@
+/obj/structure/banner
+	name = "corporate banner"
+	desc = "A blue flag emblazoned with a golden logo of Nanotrasen hanging from a wooden stand."
+	anchored = 1
+	density = 1
+	layer = 9
+	icon = 'icons/obj/banner.dmi'
+	icon_state = "banner_down"
+
+/obj/structure/banner/verb/toggle()
+	set src in oview(1)
+	set category = "Object"
+	set name = "Toggle Banner"
+
+	if(!usr.canmove || usr.stat || usr.restrained())
+		return 0
+
+	switch(icon_state)
+		if("banner_down")
+			src.icon_state = "banner_up"
+			usr << "You roll up the cloth."
+		if("banner_up")
+			src.icon_state = "banner_down"
+			usr << "You let the cloth hang loose."
+		else
+			usr << "You feel slightly dumber."
+			return
+
+	src.update_icon()
+
+/obj/structure/banner/attackby(obj/item/W, mob/user)
+	if(istype(W, /obj/item/weapon/wrench))
+		switch(anchored)
+			if(0)
+				anchored = 1
+				playsound(src.loc, 'sound/items/Ratchet.ogg', 75, 1)
+				user.visible_message("[user.name] secures [src.name] to the floor.", "You secure [src.name] to the floor.", "You hear a ratchet")
+			if(1)
+				anchored = 0
+				playsound(src.loc, 'sound/items/Ratchet.ogg', 75, 1)
+				user.visible_message("[user.name] unsecures [src.name] reinforcing bolts from the floor.", "You unsecure [src.name] from the floor.", "You hear a ratchet")
+		return