Well, here are the four cocks that are going to be having their way with your holes and cumming all over your face.
Stroke them. Make them excited and hard. Show these cocks that you can't what for them to be inside of you.
Suck each one in turn. Start slowly, but after a while, let those cocks start fucking your throat violently. After all, this is a gangbang and the whole point of this scene is to leave your mouth and ass wrecked by the end of it.
That's it slut, take those cocks deep down in your throat. Gag as each one takes turns thrusting deeper and deeper down your neck. As soon as one pulls out of your mouth, the next one goes in, fucking your mouth even harder than the one before it.