Scoop up the drywall compound using a trowel. Get a generous amount.
Spread the drywall compound evenly across the wall surface, using one trowel scoop at a time.
Place the trowel over the drywall compound on the wall and create a swirl by using your hand and wrist to direct the handle of the trowel, as opposed to your entire arm. This will put less pressure on the drywall compound, creating a wispier pattern.
Overlap the side of the first swirl by up to half and create the next swirl in the drywall compound.
Continue spreading drywall across the wall and then making a swirl texture over it, continuing to use one trowel scoop at a time.
Stand back every minute or two. If you see a swirl you're not happy with, smooth it out with your trowel and create a new one before the plaster has time to set.