I need to have a cell flash back and forth between colors and continue to do so until the Enter key is pressed. I've seen this before, but can't remember how it goes. The code is just a simple loop that counts to a certain number, changes the cell color, starts the count over, changes the color back, then repeats until you hit Enter. Also, it would be helpful to change the flash rate, to speed it up or slow it down; do certain loop counts equate to a specific amount of time? Appreciate any help.