XScreenSaver is a modular screen saver and locker for the X Window System. It is highly customizable and allows the use of any program that can draw on the root window as a display mode. It is also more stable than xlock and has more than 140 modes.
cb8839a35c2fd68d851903abb4dc2b82d90b12ce7fbc848f9dc4fb458ee1eccc