One of the screensavers that always comes with Windows is the typical one which creates different spirals and geometric shapes. It must be really popular, because they have created this Camtech Black Hole as a copy of it.
The best thing about Camtech Black Hole is that the user can configure the characteristics and properties, like indicating the size of the changes, the speed, the colours to use and the combinations to form.
The effect created by Camtech Black Hole with these spirals and shapes is that of a black hole obviously, but one that starts to swallow up each one of the objects one by one.