I decided to make a simplified night light with an LED and a phototransistor. I wanted the LED to turn on when it is dark and to turn off when it is bright. This time, I actually used the Autorouter tool in Eagle and it almost worked. I set the settings so that it would not try to use two layers. There was one connection that could not be completed but otherwise I was very satisfied with the traces the software created. For the last trace, I manually drew two squares for a jumper. I would connect those two squares with a piece of wire.
The milled PCB was okay. There were a lot of thin scraps that were not cut clean from the traces so I had to use the cutter knife to clean out the traces.