I am working with Processing 2.0b7, and most of the examples are out of date.
Mostly because 2.0b7 doesn't play well with Arduino.
All I want to do is turn LED 13 on and off when the screen is pressed.
When what screen is pressed?
It should be relatively simple, but every example is complicated enough that I'm having trouble stripping out what I need.
Pick one, and show us what you are starting from.
its the Processing end that keeps throwing errors and causing problems.
Well, fix them. Or download 1.5.1, instead. Or tell us what they are. Or all of the above.