This is a widely used tap step especially for traveling. It can be done with an even rhythm - &1&2&3&4
Or a swing rhythm = a1 a2 a3 a4
with the swing rhythm being more popular.
Tip: Scraping sounds on the flap are often a problem for beginners. To keep the sounds clean do the following:
Avoid pointing the foot.
Avoid hitting the first sound of the flap too far back.
Lift the ball tap up off the floor IMMEDIATELY after it hits.
Don’t kick the flap too far forward after the brush.
Flap Ball Change = fbc
Tap Dance Move Shown by Rod Howell