Hi guys!
I am searching for a way to create a square at the right of the screen in order to add points in there. Is there a way i can do this?
Also, the square must have an opacity(transparency).

Yes, it can be done. Use primitives with the proper colors and blender.

If your using Allegro 4.x you can use draw_trans_sprite after setting the blender; if your using Allegro 5 I'm stuck.

Actually, in allegro 4, if you're using the primitives, you want to call drawing_mode to setup translucent drawing.

and in Allegro 5 it's al_set_blender() and then al_draw_*()

Thomas, I thought it was set_trans_blender() ?? I smoke a lot

EDIT:

Ahh using primitives, sorry