Refactors Spark Spread Activation

code/modules/power/singularity/containment_field.dm

@@ -99,9 +99,7 @@
 	if(hasShocked)
 		return 0
 	hasShocked = 1
-	var/datum/effect_system/spark_spread/s = new /datum/effect_system/spark_spread
-	s.set_up(5, 1, AM.loc)
-	s.start()
+	do_sparks(5, 1, AM.loc)
 	var/atom/target = get_edge_target_turf(AM, get_dir(src, get_step_away(AM, src)))
 	AM.throw_at(target, 200, 4)
 	spawn(5)

code/modules/power/singularity/emitter.dm

@@ -24,6 +24,7 @@
 	var/frequency = 0
 	var/id_tag = null
 	var/datum/radio_frequency/radio_connection
+	var/datum/effect_system/spark_spread/sparks
 
 /obj/machinery/power/emitter/New()
 	..()
@@ -32,6 +33,8 @@
 	component_parts += new /obj/item/stock_parts/micro_laser(null)
 	component_parts += new /obj/item/stock_parts/manipulator(null)
 	RefreshParts()
+	sparks = new
+	sparks.set_up(5, 1, src)
 
 /obj/machinery/power/emitter/RefreshParts()
 	var/max_firedelay = 120
@@ -124,6 +127,7 @@
 	msg_admin_attack("Emitter deleted at ([x],[y],[z] - [ADMIN_JMP(src)])", ATKLOG_FEW)
 	log_game("Emitter deleted at ([x],[y],[z])")
 	investigate_log("<font color='red'>deleted</font> at ([x],[y],[z])","singulo")
+	QDEL_NULL(sparks)
 	return ..()
 
 /obj/machinery/power/emitter/update_icon()
@@ -206,9 +210,7 @@
 		A.dir = src.dir
 		playsound(get_turf(src), 'sound/weapons/emitter.ogg', 25, 1)
 		if(prob(35))
-			var/datum/effect_system/spark_spread/s = new /datum/effect_system/spark_spread
-			s.set_up(5, 1, src)
-			s.start()
+			sparks.start()
 
 		switch(dir)
 			if(NORTH)