I know this is a question that probably gets asked a lot.

I'm trying to make a map like fun_allinone where a random door opens for CT and T's at the start of round and then teleports the users to a min-map giving them a pre-set weapon.

I found a random teleport destination trigger on here, although it's something close to what I want to achieve, I'm really looking to learn how I can open a random door at the beginning of each round. I'm familiar with VHE/Jack Hamer but I'd appreciate a detailed broken down explanation if anybody has the time.

Looking forward for the help :D