Basic State Machine Example.cs

public enum States
{
  Idle,
  Walking,
  Running
}

public float speed = 0.0f;

public void SetState(States newState)
{
  switch(newState)
  {
    case States.Idle:
      speed = 0.0f;
      break;
    case States.Walking:
      speed = 1.0f;
      break;
    case States.Running:
      speed = 2.0f;
      break;
  }
}