Program that does a screen print every 15 minutes and saves it to a file [closed]

TimeSnapper:

The Automatic Screenshot Journal

TimeSnapper runs in the background of your computer, taking screenshots of your desktop every few seconds all week long.

Where did all my time go?TimeSnapper lets you play back your week just like a movie. You can play it at any speed you like, and jump in at any time you like.

When it's time to fill out that dreaded timesheet, TimeSnapper is a savior. No need to tear your hair out trying to remember where all the time went.

You haven't specified operating system so on linux I'd add this to my crontab:

*/15 * * * * scrot

Assuming scrot was installed.