Text in opengl

Hi, I’m trying to add front screen but it’s not working. A blank screen appears. Pls advice

This could be caused by:

Cosmic rays.
Phases of the moon.
The spirits of the dead.
A mistake in your code.

Seriously - “it’s not working, a blank screen appears” is not a good description of your problem. Help us to help you. Show some code. Tell us what you mean by “trying to add front screen”. Anything.