Use a pencil to lightly draw outline of picture you like directly onto the mug. i've chosen mine from google images.
Fill with paint. To prevent paint dripping put the mug on its side to dry.
I used Pebeo Porcelaine 150 waterbased paint[http://en.pebeo.com/Pebeo]
Preheat the oven at 300 degrees Fahrenheit. (150 degrees Celcius).
Once dry, bake it for 35 minutes to make paint dishwasher resistant.
Take it out of the oven. let it cool down at least 30 minutes, the design fixes this way.if you can still wipe it off, bake it again.