This is only a still from the magic cube viewer—Java is now unsupported in browsers so the instructions below will not work.
The red animation traces the 'magic line' created by joining all points in sequence from first to last (1 to 4x4x4 - or n^3 where 'n' is the cube's order).
To switch numbers on and off press the 'n' key - click once in in the applet window first.
To rotate the pattern click and drag in the applet window.
If you press 's' a starfield is turned on or off.