/// <summary>
/// Instantiates a customer in delayed times
/// </summary>
/// <returns></returns>
private IEnumerator SpawnCycle()
{
foreach (float time in spawnTime)
{
// fixed arrival time
yield return(new WaitForSeconds(time));
// line overflow waiting loop
if (waitingArea.IsLineFull())
{
yield return(waitingArea.OverflowLine());
}
NewCustomer();
}
}