Unity C# Change Object Transparency

The only commands you need for this one are: 1. Declare a float variable 2. GetComponent SpriteRenderer, setting the fourth value to the float declared in step 1. 3. A statement to change that float variable based on some condition. I included the Keycode commands really just as a quick way of changing the alpha value. Instead you could change the alpha variable based on a collision or based on passage of time or some other factor.