My apologies, but just a follow up, here is what I need: As part of my program I need an interrupt or timer to count pulses in the background,store that value in a variable, then enter a second loop where it counts pulses again and compares it to the first variable and makes corrections through a stepper motor. I believe this is possible with PBP but I have absolutely no experience with assembly or C. Yes, I found out how to use an interrupt to to turn on an LED, but it just gets over my head as to how to do this in the background and making adjustments at the same time. Oh, and Art, you are probably right about moving on to a what? A risc assembler? Well, as I said unless this could be programmed in BASIC, then I couldn't use it. A simple question, can what I want to do be done? Can it be done in PBP? If not then I am at the end of the road and will have to put my program to bed and move on to something else. Please don't answer in riddles that I am supposed to solve. Thanks in advance.