How to fade in and out two logos inside the same scene? [c#]

I wanted to make a scene only for my logo (one logo from my school, and another for my group), without having to create a scene for each logo. Instead, I created a panel for each logo, and I want to make each of them fade in, stay on the screen for 2 seconds, and fade out.
I tried many scripts, but none of them seems to work.

Have you tried CrossFadeAlpha?

Just a note, if you want them to start transparent, do not set the alpha manually in the editor or CrossFadeAlpha will not work. Use SetAlpha to set the transparency.