You can spawn armor stands randomly (like paintings) 
or get a specific skin by renaming it on the anvil 
(you can rename the armor stand itself or give a name tag)

RENAMES:

Vanilla materials:

*Oak*
*Acacia*
*Birch*
*Spruce*
*Dark_oak*
*Jungle*
*Mangrove*
*Bamboo*
*Cherry*
*Crimson*
*Warped*
*Red_mushroom*
*Brown_mushroom*
*Stone*
*Ender*
*Quartz*

Colored:

Modded materials:


