The following animation shows the functioning of Quicksort.

In the animation window an array is shown that is to be sorted by Quicksort.

The window \tt <Source Code> \rm shows the algorithm. In each step of the algorithm 
the actual line of code is highlighted by a different color.

Button \tt <Goto> \rm allows to execute the animation automatically up to the 
corresponding line of code.

The speed of the animation can be adjusted by the button \tt <Delay>.

In the window \tt <State of the Variables> \rm the actual values of the variables
are shown.

The animation can be stopped at any time in the single step mode by pressing 
button \tt <Cancel>.