Added holosigns, specifically surgery one.

Pretty much a floating sign, toggled by a switch.

baystation12.dme

@@ -317,6 +317,7 @@
 #include "code\game\machinery\spaceheater.dm"
 #include "code\game\machinery\status_display.dm"
 #include "code\game\machinery\suit_storage_unit.dm"
+#include "code\game\machinery\holosign.dm"
 #include "code\game\machinery\syndicatebeacon.dm"
 #include "code\game\machinery\teleporter.dm"
 #include "code\game\machinery\transformer.dm"

code/game/machinery/holosign.dm

@@ -0,0 +1,78 @@
+////////////////////HOLOSIGN///////////////////////////////////////
+/obj/machinery/holosign
+	name = "holosign"
+	desc = "Small wall-mounted holographic projector"
+	icon = 'holosign.dmi'
+	icon_state = "sign_off"
+	layer = 4
+	var/lit = 0
+	var/id = null
+	var/on_icon = "sign_on"
+
+	proc/toggle()
+		if (stat & (BROKEN|NOPOWER))
+			return
+		lit = !lit
+		update_icon()
+
+	update_icon()
+		if (!lit)
+			icon_state = "sign_off"
+		else
+			icon_state = on_icon
+
+	power_change()
+		if (stat & NOPOWER)
+			lit = 0
+		update_icon()
+
+/obj/machinery/holosign/surgery
+	name = "surgery holosign"
+	desc = "Small wall-mounted holographic projector. This one reads SURGERY."
+	on_icon = "surgery"
+////////////////////SWITCH///////////////////////////////////////
+
+/obj/machinery/holosign_switch
+	name = "holosign switch"
+	icon = 'icons/obj/power.dmi'
+	icon_state = "light1"
+	desc = "A remote control switch for holosign."
+	var/id = null
+	var/active = 0
+	anchored = 1.0
+	use_power = 1
+	idle_power_usage = 2
+	active_power_usage = 4
+
+/obj/machinery/holosign_switch/attack_ai(mob/user as mob)
+	return src.attack_hand(user)
+/
+obj/machinery/holosign_switch/attack_paw(mob/user as mob)
+	return src.attack_hand(user)
+
+/obj/machinery/holosign_switch/attackby(obj/item/weapon/W, mob/user as mob)
+	if(istype(W, /obj/item/device/detective_scanner))
+		return
+	return src.attack_hand(user)
+
+/obj/machinery/holosign_switch/attack_hand(mob/user as mob)
+	src.add_fingerprint(usr)
+	if(stat & (NOPOWER|BROKEN))
+		return
+	add_fingerprint(user)
+
+	use_power(5)
+
+	active = !active
+	if(active)
+		icon_state = "light1"
+	else
+		icon_state = "light0"
+
+	for(var/obj/machinery/holosign/M in world)
+		if (M.id == src.id)
+			spawn( 0 )
+				M.toggle()
+				return
+
+	return