The first step will be on the 2nd beat of the music. Leader steps forward on left, while follower steps backward on right. Leader replaces back onto Right, follower replaces forward onto left. This is the chasse. The follower does the mirror opposite.
Leader steps back on right, follower forward on left.
Leader replaces forward onto left, follower replaces back onto right. Remember to keep steps small . Although we're stepping forward and backward on the 2, the 1 is still the most important beat. That beat is what is accentuated the most. The leaders footwork of this move is exactly the same, only the followers footwork differs.