As with changing the pitch, changing speed only requires the percent change value to be altered for full control. Positive values also render the file unreadable, therefore only negative values should be used. Similarly, multiples of 10 result in a more legible image, whereas values between these multiples alter the direction of the pattern. Colour is also interpreted as black, white, grey and flurries of multicoloured pixels. With every multiple of ten, the image is zoomed into, simultaneously revealing how one section is repeated.