Fade GUI TEXT OBJECT on keypress

Upon going to GameObject, Create Other, GUI TEXT, I am trying to make my centered “GUI TEXT” APPEAR then fade instantly whenever I press the “A” key. I want it to fade all the way to invincible, then when I tap the A key. I searched Unity Answers and the answers giving did not work. How do you do this using JAVASCRIPT? Do you have to use OnGUI?

Fade over time.