Bits Screensaver is a curious, free screensaver, light in weight, showing random bits. Bits Screensaver offers a black background with noughts and ones (in green) which are the bits (as you know, they are the essence of computer processing).
Characteristically it reminds you a little of the classic
3D Matrix Screensaver.
The program offers the option to make certain changes to the bits from the configuration menu: you can change them to whole numbers, for example.
If you want a minimalist screensaver, this is your chance.