Remove any electrical plates or wall hangings attached to the wall. Clean the area with soap and water to remove grease, dirt or dust on the wall.
Pick a primer for the color you want the grout lines to be. Pour primer into a paint tray, and load a regular paint roller with the primer by rolling it back and forth in the tray. Cover the wood completely and let it dry for two hours or until primer is completely dry.
Measure the brick out with a ruler. Bricks are typically 3 inches wide by 7 inches long; allow a 1-inch space between the bricks for the grout. Stagger the bricks in the rows so they will look natural. Use colored chalk to mark the outline.
Affix blue painter's tape to all of the grout lines. Use a trowel to put 1/2 inch of spackling paste over the area. Clean the spackling paste off the blue tape grout lines with damp cloth. Let dry completely.
Paint another coat of spackling finish on the wall using a textured paint roller. Let dry completely. Peel off the blue painter's tape.
Use a sponge to add color to the brick. Dapple red to the entire brick and let it dry completely. Add a dapple of black, gray, yellow and white over the red. Let each color dry completely before adding the next color
Clean brushes and equipment with soap and water. Let the faux brick dry for 24 hours before replacing electrical plates and wall hangings.