I was going to post my attempt, but FramerTim's is much better. Mine is a T out of the wall horizontally, with one elbow on the left with a valve and the return jet, and then the other elbow to the right, but straight up with the vertical fountain.
The only thing, then, that I can contribute is that I found a MUCH bigger selection of threaded 1.5" pvc parts at Lowe's than at Home Depot. In fact, I'm not sure Home Depot had any. The threaded stuff makes it fast and less permanent, which is nice for experimenting. I have a few pieces I have to glue, like some hub parts I'm using to create a male-to-male threaded adapter.
I looked at the ball joints at Home Depot, but they were terribly hard to turn and I was concerned about putting pressure on the pipes. Lowe's had cheaper, easier-to-turn 1.5" union valves.
Even I have to admit that 95+ is too warm for a pool!
Amy