For this project, we used 1/2-inch artist's tape to map out the octagon and 3/4-inch tape for the square (it's also available in a 1-inch width).

Paint in Thunderhead (door), by Martha Stewart Living Paint from The Home Depot; Paint, in All White (octagon) from Farrow & Ball Paint, and Puddle (square), from Fine Paints of Europe.

Tools and Materials

• Measuring tape
• Metal ruler
• Water-soluble pencil
• Artist's tape
• Blue painters' tape
• Single-edge razor
• Semigloss paint (in one or two accent colors of your choosing)
• 1/2-inch flat nylon brush

Geometric Designed Door How-To

1. Remove door from hinges. Using measuring tape, determine the dimensions of your door and the spacing of the squares (for this project, we created three 22-inch squares). Using ruler and pencil, draw each square.

2. Place artist's tape inside the outline of each square; lightly rub to smooth.

3. Adhere painters' tape along the outside and inside edges of artist's tape=. For the strips of painters' tape on the inner part of the squares, miter the corners using razor to create a clean edge.

4. Remove artist's tape, and paint the space between the pieces of painters' tape. Let dry.

5. Wipe off pencil marks with a damp paper towel.

6. Repeat process with octagons. (Ours are 3/4 inch from the outside edge of each square.)