3D puzzle trefoil knot game

Move the green and red points or the square in the applet below to assemble the three parts into this square trefoil knot.

Move the green and red points or the square in the applet below to assemble the three parts into this square trefoil knot.
Aim of the game : trefoil knot

Instructions.

The blue square has to have one unit side length as shown at the beginning. But it might not be oriented properly, nor at the right place on the grid. Once you are done, move the 3D view around so that it appears on the thumbnails of the class.