adds basic menu functionnality

Countdown.gd

@@ -4,6 +4,7 @@ signal race_started
 
 export (int) var delay = 3
 var timer
+var time_left = delay
 
 
 func _ready():
@@ -12,21 +13,26 @@ func _ready():
 	add_child(timer)
 	timer.wait_time = 1.0
 	timer.connect("timeout", self, "_timeout")
-	timer.start()
 	
-	$Number.set_text("%d" % delay)
 
 
+func start():
+	set_visible(true)
+	time_left = delay
+	$Number.set_text("%d" % time_left)
+	timer.start()
+	return self
+	
 func _timeout():
 	#print("Timeout !")
-	delay -= 1
-	if delay < 0:
+	time_left -= 1
+	if time_left < 0:
 		timer.stop()
 		set_visible(false)
-	elif delay == 0:
+	elif time_left == 0:
 		# Go !
 		$Number.set_text("GO")
 		emit_signal("race_started")
 	else:
-		$Number.set_text("%d" % delay)
+		$Number.set_text("%d" % time_left)