Enriching a floor with color and pattern just got easier. This painted "rug" owes its charm to a 22½-inch-square Mylar stencil that creates a large, intricate geometric design. The most time-consuming part is the prep: Lightly sand and thoroughly dust the floor before putting down two base coats of porch-and-floor paint. Then map out rows of full squares, spacing them 2 inches apart. Painter's tape can help establish a solid border, and stencil adhesive and a dense foam roller will also make the job go quickly. Avoid overloading the roller, which can cause bleeding under the stencil; two thin coats are better than one thick coat.