Red Stained Glass Minecraft. Stained Glass is created by dying Glass with various Dyes. Magenta stained glass naturally generates as windows in end cities.
Not trying to be too critical here, but your example the light passed is sort of blurred together, with not a lot of contrast between colors. Stained glass is a helpful way to decorate your Minecraft house or building. Also, there seems to be no MaterialData for glass, like there is for wool.
Stained Glass is a decorative variant of a regular glass block, but it has a colored "tint" added to it.
Minecraft Items is a complete, searchable list of all current item IDs in Minecraft.
Minecraft has a lot of blocks, but what if they had more? It is used primarily as decoration. In Minecraft, red stained glass is one of the many building blocks that you can make.