(Figure ) An example of a series of changes is shown below (figure ), one set bit is unset, and an unset bit is set at each step, keeping the same total number of set bits. The changes from step 1 to step 2 are in red, 2 to 3 in green and 3 to 4 in blue. The steps can be widened (i.e. more bit positions changed at each step) by sampling this generator at regular or random intervals.