// code
	if (Input.GetMouseButtonDown(0)) {
		Debug.Log ("MOUSE DOWN!");
		GUI.contentColor = Color.red;
	}

	if (Input.GetMouseButtonUp (0)) {
		Debug.Log ("MOUSE UP!");
	//	more code
	}


void Update () {
	if (Input.GetMouseButtonDown(0)) {
		print ("Mouse Button Down !");
	}
}