duck

function Start () {

    yield WaitForSeconds(1.0);

    yield DoFunctionForTime( FunctionA, 1.0 );

    yield DoFunctionForTime( FunctionB, 1.0 );

}

function FunctionA() {
    Debug.Log("Function A!");
}

function FunctionB() {
    Debug.Log("Function B!");
}

function DoFunctionForTime(delegateFunction, time : float) : IEnumerator
{
    var finishTime = Time.time + time;
    while (Time.time < finishTime)
    {
        delegateFunction();
        yield;
    }
}