I want a web page that will display a square with a dot moving smoothly around it. The page will ask the visitor to use their mouse or other pointing device to follow a dot around the square for about 10 seconds. The dot will light up or turn green when the cursor is close to it, indicating success in keeping the cursor on the dot. Then the software will measure the distance between each two subsequent position samples to determine speed of cursor movement during each interval, comparing it to the previous speed, then feed the data into a FFT to determine the frequency at which the hand is trembling (between 2 and 40 Hz). Then, based on the dominant frequency of trembling, it will redirect the visitor to one of several web pages.