Update assemblies to modern coding standards

code/modules/assembly/timer.dm

@@ -14,14 +14,14 @@
 
 
 /obj/item/device/assembly/timer/activate()
-	if(!..())	return 0//Cooldown check
+	if(!..())
+		return FALSE
 
 	timing = !timing
 
 	update_icon()
 	return 0
 
-
 /obj/item/device/assembly/timer/toggle_secure()
 	secured = !secured
 	if(secured)
@@ -32,27 +32,25 @@
 	update_icon()
 	return secured
 
+/obj/item/device/assembly/timer/proc/set_state(var/state)
+	if(state && !timing) //Not running, starting though
+		START_PROCESSING(SSobj, src)
+	else if(timing && !state) //Running, stopping though
+		STOP_PROCESSING(SSobj, src)
+	timing = state
 
 /obj/item/device/assembly/timer/proc/timer_end()
-	if(!secured)	return 0
+	if(!secured)
+		return 0
 	pulse(0)
 	if(!holder)
 		visible_message("[bicon(src)] *beep* *beep*", "*beep* *beep*")
-	cooldown = 2
-	spawn(10)
-		process_cooldown()
-	return
-
 
 /obj/item/device/assembly/timer/process()
-	if(timing && (time > 0))
-		time--
-	if(timing && time <= 0)
-		timing = 0
+	if(timing && time-- <= 0)
+		set_state(0)
 		timer_end()
 		time = 10
-	return
-
 
 /obj/item/device/assembly/timer/update_icon()
 	overlays.Cut()
@@ -87,7 +85,8 @@
 		return
 
 	if(href_list["time"])
-		timing = text2num(href_list["time"])
+		var/new_timing = text2num(href_list["time"])
+		set_state(new_timing)
 		update_icon()
 
 	if(href_list["tp"])