Shift click on green flag to use turbo mode. Transverse waves are described by the equation: y= A*sin(kx-wt) where A is the amplitude k is the wave number w is the angular frequency t is time You should be able to see that it is very similar to the equation for simple harmonic motion: y= A*sin(wt) This means that the y value is a function of the x position as well as time. In other words, the sprites (at the various x positions) will have different phases. wave number, k, is the number of cycles per length angular frequency, w, is the number of cycles per unit time