Hi dustyvermont, this is not how light works!
When you have a red piece of glass, then that piece of glass will let only red light pass through. When you have a blue piece of glass, that will only let blue light pass through. When you let light pass though both of them, for instance first the red and then the blue glass, then after the first glass, the light will be red, which has no blue component, so after the blue glass there will be no light left!
The colored glass works as a filter!
When you put multiple layers of glass (colored or not) behind each other, the amount of light that passes through those layers will never be more than the light from the light source! (This is multiplicative)
On the other hand, when you shine two flashlights (colored or not) at the same spot, the light will be brighter than each single light source! (This is additive.)
This is why you never see multiple layers of stained glass in real life.
You might want to re-consider what you want to do.
