Climb a series of four steps, starting with the left foot, then right, left again, and finishing with the right.
Ascend four steps by stepping left, right, left, and right in sequence.
Take four steps upward, alternating feet: left, right, left, then right.
Move up the staircase in four moves, following the pattern left, right, left, right.
Step up four times, beginning with the left foot and alternating to right, left, and right.
