initial commit - cross reference with 5th port - obviously has compile errors

code/modules/events/meteor_wave.dm

@@ -0,0 +1,34 @@
+/datum/round_event_control/meteor_wave
+	name = "Meteor Wave"
+	typepath = /datum/round_event/meteor_wave
+	weight = 5
+	min_players = 5
+	max_occurrences = 3
+
+/datum/round_event/meteor_wave
+	startWhen		= 6
+	endWhen			= 66
+	announceWhen	= 1
+	var/list/wave_type
+
+/datum/round_event/meteor_wave/New()
+	..()
+	random_wave_type()
+
+/datum/round_event/meteor_wave/proc/random_wave_type()
+	var/picked_wave = pickweight(list("normal" = 50, "threatening" = 40, "catastrophic" = 10))
+	switch(picked_wave)
+		if("normal")
+			wave_type = meteors_normal
+		if("threatening")
+			wave_type = meteors_threatening
+		if("catastrophic")
+			wave_type = meteors_catastrophic
+
+/datum/round_event/meteor_wave/announce()
+	priority_announce("Meteors have been detected on collision course with the station.", "Meteor Alert", 'sound/AI/meteors.ogg')
+
+
+/datum/round_event/meteor_wave/tick()
+	if(IsMultiple(activeFor, 3))
+		spawn_meteors(5, wave_type) //meteor list types defined in gamemode/meteor/meteors.dm