addressing my own complaints

change %s to .format(), changes to instructions. 

With `basic_experiment` I'm also occasionally getting `thread.error`s in the existing console window when I hit `F5` in Spyder to re-run the code after making changes. I *think* this is a pyglet problem (remember seeing pyglet in the traceback) but I was unable to copy/paste the error and traceback because it hangs the system for several seconds, then as soon as it unhangs, the python session ends and it starts a fresh one.