Prepare to paint: Using the level, measure 8" from the top corner of the wall inward and mark that width with a piece of masking tape. Also use the level to measure 8" inward from the bottom corner of the wall. Now, use your level to tape off the entire line, top to bottom, with the smaller pieces of masking tape as your guide. Bring the level down the wall to ensure the line is straight. Continue across the wall, measuring and using a level to create equal, straight lines.
Step 1: Once the stripes have been taped off, paint every other stripe with clear glaze.