I would love to be able to paint surfaces in my beacon. This would be done with a new type of stone device, Mortar and Pestle.
Mortar and Pestle–>10 stone–>Crafting Table
Colors are collected by types of plants.
Mortar and Pestle Recipes
2 Plant–>1 Powder
1 powder+sap+pure water–>Paint
Each 1 Paint can be applied to 4 block surfaces.
To get pure water, would require a suggestion I had before for a filter.
You can fill this with muddy water to make pure water.
To get muddy water, you use a metal bucket at a water source.
This idea is listed more here. Support Path Idea when I talk about Medicine