This page, which describes the move known as a Z-step, is part of the Turnstep Dictionary at www.turnstep.com.
A Z-step (also known as a zig-zag) forms the letter "Z" as you move. Step up on the bench, move across, back diagonally, and step across. You will end up facing the same way, off to the side from where you started. (The "Z" is formed by counts 3-8.) You may also want to tap your foot on counts 4 and 6, which may make the move easier.
This move is done in 8 counts: