Screensaver (noun)

A program or animation that runs automatically on a computer screen when the user is not actively using the computer.

Origin:

Derived from 'screen' + 'saver'.

Examples:

1. The screensaver was a mesmerizing display of stars and galaxies, taking us on a journey through the cosmos.
2. I remember the days of black and white screensavers, with simple geometric shapes floating across the screen.
3. The screensaver was a way to show off your personality and interests, with options ranging from abstract art to photos of your family.
4. The screensaver was a way to save energy, putting your monitor to sleep after a set amount of time.
5. The screensaver was a source of entertainment, providing a mini-show every time you stepped away from your computer.