/// <summary>
/// Update the raxCounter's timer
/// </summary>
/// <param name="time">update the timer by this time</param>
public void UpdateTimer(float time)
{
spawnTimer -= time;
//timer is up
if (spawnTimer <= 0)
{
//spawn the wave
rax.SpawnWave();
//reset timer
spawnTimer = spawnRate;
}
timerText.text = ((int)spawnTimer).ToString();
}