Here's what you need:
Just draw your design on with a sharpie, then attach the faux lead adhesive strips to the glass. The rocket science breakthrough came when I poured the stained glass paint on a flat piece of glass to cure over night. I was then able to cut it into pieces and press it into the spaces I needed filled. Overlapping and smashing the pieces into place actually works to make it look like real stained glass.
I hope to get all my windows done this winter, then wait for it to snow! I think the white background will really make the red *Pop*!