Yal, seriously, if you love stained glass...but are lazy or don't want to deal with shards of glass all over your house(I'm in the lazy category). They make BLACK hot glue(for hair extensions, whaaaat?!). This has to be the easiest leading ever!
Get yourself a big sheet of plastic, glue on your pattern, and paint in the gaps with glass paint or that plastic glass paint stuff. You could also cut up colored plastic bits and glue those directly on to the plastic, or even directly onto your window!
I just got super excited about this idea and had to send it off into the wild wild world. Eeeeeee, I'm so rarin' to go!
I think they make glue in other colors too, like gold, I bet you could make some awesome fake cloisonné with that. Yeaha!