This is the first version of a Pushup Tool that will let you set a number of pushups and break it up into 5 push ups with 15 seconds in between as a break. So far I just set the default to 40 because that's how many I can do and haven't coded customization but I plan to later.
I got this idea from a Fitness test I had to take. I thought that I could max out reps by simply adding a small break in between so I coded this small sample. Hope it's useful. Also, a new project is underway. It's pretty big and will probably come out soon.