Brainstring Houdini

Can you free Houdini? The greatest escape artist of all time is tied up and needs your help to break free. Harry Houdini has been known to break free from jails, handcuffs, chains, ropes, and straitjackets. But he'll need your brain power to wiggle out of the Brainstring knot...
To set the puzzle, move the strings along the tracks to tie a challenging 'knot' around Houdini - now the brainteaser puzzle is ready for you to solve. To solve the puzzle, you need to sort the strings so that the Red strings are on top and bottom and the black strings are facing the sides. If you have sorted the coloured strings correctly, then you will see that Houdini has been untangled and free from the web you once trapped him in.