To create this smoke effect, you first need to open a new comp in Adobe After Effects. Then create a new white solid. Go up to Effect, Simulation, CC Particle System II. The effects control box will open on the left side. Here is wear you can mess with the controls. First select a Particle Type, I used the shaded sphere. Now you can mess around with the controls under the Particle and Psychics tag until you get your “smoke” to your liking. It might take while to get everything the way you want it to but thats because this isn’t the most ideal way to create effects this way. But, for a quick effect, this should do just fine.