gears: made balls despawn after 5 seconds

gears/ball.gd

@@ -7,9 +7,13 @@ func gear_id():
 func continuous():
 	return false
 	
+func kill_ball(ball):
+	ball.queue_free()
+
 func make_ball(player):
 	var ball = RigidBody3D.new()
 	var cs = CollisionShape3D.new()
+	var timer = Timer.new()
 	cs.shape = SphereShape3D.new()
 	ball.name = "Ball"
 	ball.mass = 4
@@ -20,11 +24,16 @@ func make_ball(player):
 	ball.set_collision_layer_value(1, false)
 	ball.set_collision_layer_value(3, true)
 	ball.set_collision_mask_value(3, true)
+	timer.one_shot = true
+	timer.autostart = true
+	timer.wait_time = 5
+	timer.timeout.connect(kill_ball.bind(ball))
 
 	var mesh = $GearMesh.duplicate()
 	mesh.position = Vector3.ZERO
 	ball.add_child(mesh)
 	ball.add_child(cs)
+	ball.add_child(timer)
 
 	return ball