Wait

function byFrames (a : float) {
    var b = a/Application.targetFrameRate;
    for (var i = 0; i<b; i++) {
        yield;
}}

function byFixedUpdates (a : float) {
    var b = (a/Time.fixedDeltaTime*Time.timeScale);
    for (var i = 0; i<b; i++) {
        yield WaitForFixedUpdate ();
}}