Write some Software

I have a program that has a start button and a stop button . I need a kill switch program with timer. The program sometimes uses up a lot of computer resources and browsers that pop in front of it that makes it hard to hit the stop button. So I need a program that I can Ioad and set a timer that will hit the stop button and wait then hit the start button. Also need the program to have a kill button where I can hit and it will hit stop the button.