Take a deep breath: Scribbles from a permanent marker on the wall do not have to remain permanent. Instead of worrying about how to hide those stains, get rid of them with a variety of homemade solutions. It may take several different methods to remove the marks entirely, depending upon the wall covering and its texture.
Erasing the Stains
Melamine foam, designed to remove marks from many types of surfaces, erases permanent marker from many wall and door surfaces. Wet the sponge-like foam just enough to make it damp; then rub it over the marks, wiping from one end of the mark toward the other, rather than rubbing from the inside of the stain outward. This prevents smearing or smudging the mark, which may make a worse stain. Test the foam on an inconspicuous area of the wall first to ensure it doesn't affect the paint or wall covering. A foam eraser may tear apart quickly on highly textured wall surfaces such as bead board or wood paneling.
Remove marker stains from metal and vinyl doors or wall panels, as well as finished wood and some painted walls, using a citrus-based stain and sticker remover. This type of cleaner is best for non-porous surfaces that won't absorb the cleaning solution. Test the cleaner on an inconspicuous area of the wall or door, waiting several minutes before wiping it away to ensure the liquid does not cause a stain. Dab the cleaner over the ink using a cotton swab, following the ink lines. After several minutes, blot the cleaner away with paper towels or a soft white cloth. Clean the area with soapy water on a sponge afterwards; then wipe it clean with a damp cloth.
Absorb With Alcohol
Rubbing alcohol lifts permanent marker off of wall and door surfaces, especially if you act quickly. The longer the marker ink sets, the more difficult it is to remove. Moisten a cotton swab or cotton ball with rubbing alcohol; then wipe the stain, following the direction of the lines or working from the outside of a large spot toward the center. Hold the cotton on the stain for several seconds if it does not lift the ink after a quick swipe with the alcohol. Replace the swab or cotton ball with a fresh one each time it absorbs some of the ink. Avoid rubbing the ink spots, as it may spread them. Test the alcohol on an inconspicuous area before applying it to the marker stains to ensure it does not stain the wall surface.
Toothpaste contains gentle abrasives that help lift stains from surfaces such as teeth -- and walls. Apply a thin line of a white non-gel toothpaste over the stain; then wipe away the toothpaste in the direction of the marker line after it sets for 10 or 15 minutes. If the marker hasn't been removed completely, gently rub in the direction of the line using a cotton swab with a little of the toothpaste still intact. Wipe away the toothpaste residue with a slightly damp cloth. Like other methods, test the toothpaste in an inconspicuous area before applying it to the stain.