The 6 actors are stood DOWN STAGE with their backs to the audience apart from Atheist 1. Atheist 1 is to the farthest left (DOWN LEFT) and they are positioned in numerical order so that Atheist 6 is stood DOWN RIGHT.
After Atheist 1 finishes speaking, he turns his back on the audience and ATHEIST 2 turns round to speak. Thus, each time an actor has finished speaking, they turn their backs to the audience and when it is their turn to speak, they are facing the audience.
At the end, they all turn round and recite the last lines.