Not a stupid question. No real need for a diagram. You put down a layer of bedding. (wood shavings, straw, sawdust, leaves, hay, etc) The chickens poop in it and scratch around. When it gets really poopy, add more bedding. Repeat several-many times. It will get deep, and shouldn't smell bad if you have enough ventilation. It actually starts to compost.
The reason most don't have flooring is that with the deep litter method you are encouraging the bedding to break down, which tends to attack flooring, especially wood floors. Depending on how moist you keep it, it can start to rot out your floorboards.
I have a dirt floor in my large hen house. The foundation boards, 2 x 12's, are treated with used motor oil, and are pretty much impervious to rot.