Hud for logging into switch

[Jomi]

Hello i would like to make HUD that would look like a keyboard.
The idea is that i player will enter this HUD mode by pressing use key on one of computers on map that will ask for question and he need to add input.
Can someone give me idea, directions or something? Im new to Gzdoom acs but i have experience in programing.
Thank you so much people.
Peace Jomi.

[scifista42]

Check out Mortal Kombat Doom by doomero21, it does in principle exactly what you describe, except that it specifically recreates Mortal Kombat's menu in ACS.