Take a step back: the sequence is step 3, moving right, then left, then right again.
Retreat one step. This is the third move, following the order: right, left, right.
Move back a step; step number three goes right, left, and right in that order.
Step backward at number three, with the pattern: right, left, right.
Back up one step—the third in line—tracing right, left, then right.
