Spray paint the clay pot with white paint including a little on the inside.
Press your letter onto the center of your pot making sure that it adheres in all areas.
Starting with the darkest color Sharpie marker create a dotted outline close to the edges of the letter.
Then add more colors working outward.
Continue making dots around the letter with fewer and fewer dots as you get further away.
Carefully pull the letter off and allow the design to set for several hours.
Use a polyurethane spray or Mod Podge to protect the design if desired.
Notes
Instead of painting a clay pot you can use a white ceramic pot from the craft store or nursery.Clean-upYou can use a little rubbing alcohol and a cotton swab to clean up any mistakes.Adding ProtectionYou can add a thin layer of Mod Podge or polyurethane to protect the pot.Wait for several hours to allow the markers to set and gently brush Mod Podge across the design.If using a spray poly, do not get too close to the marker design but spray a gentle layer, wait an hour, and spray a second time.