Animating Stencils
You can adjust and animate any of a stencil layer's transform properties as you would any other layer in combustion. In addition, you can animate the stencil layer independently from its foreground layer. To make a stencil follow exactly the transforms of the layer to which it is applied, use layer parenting. For more information, see Transforming Layers.
For information on animating layers, see Creating Animations.