Adding Patterns to windows.

[Toddlerteaplease]

My friends front door is a copy of a Victorian one in keeping with the house. Many of the neighbours have patterns on the glass. But his is plain. He now wants to add patterns to it. Any suggestions on how to do it?

Either replace the glass with patterned glass from your local glass place or put window film on to copy it. Both can be done DIY relatively easily.