Lay down the drop cloth below the area to be painted.
Wipe away any dirt or dust from the surface of the wall using a damp sponge and a few drops of dishwashing liquid. Rinse the sponge, and then remove all traces of soap with clean water.
Paint the wall with a solid layer of light-colored paint using the roller or brush. Allow the paint to dry, and then apply a second coat. Allow the second coat to dry.
Clean the brush or roller, and set it aside.
Apply strips of painter’s tape to the wall in an irregular stripe pattern. Rip the tape sections in half, lengthwise, to get a ragged, natural appearance. Study photos of zebras for inspiration.
Apply dark paint to the wall between the painter’s tape using a cleaned brush or roller. Allow the dark paint to dry, reapply a second coat, and then allow it to dry. Peel away the painter’s tape.
Touch up as needed using a small brush loaded with dark paint.