private void StartInterval()
{
countdown = interval;
nextAction = NextAction.Wave;
audioManager.Play("IntervalSound");
audioManager.SetVolumeWithFade("MusicMainScene", 0.3f, 3f);
canvasManager.PlayPrepareYourSelf();
canvasManager.SetWaveCanvasAlpha(0);
canvasManager.AppearWaveCoolDown();
}