How can I stencil out only one part of a design of a single layer stencil without getting the paint into adjacent areas?

When you wish to use only one part of a design, tape over the cutout areas near it with stencil tape. Sometimes this is done to stencil part of the design with one color and other parts with another color. If you then want to include the areas you masked out, remove the tape, tape over the areas you previously stenciled with the first color, and stencil the next areas with the second color.