Take a step forward, then one step back. Current step: 0, step sequence: 
Move ahead and retreat by a single step. Step count stands at 0, sequence order: 
Advance one pace, then reverse exactly one. Step index: 0, order of steps: 
Step forward once, then backward once. Number of steps: 0, step progression: 
Walk one step forth and then back again. Step tally: 0, sequence of steps: 
