Hey guys LukeAsArts here bringing you a new video.
This is a new version of my original armor stands with arms video.
This version is faster and easier.
This command makes it work just place this command into a repeating command block and power! that's all.
/entitydata @e[type=Armor_Stand] {ShowArms:1}
Here are some reasons on why it didn't work and how to fix It.
Make sure you're In the right minecraft version the video states what versions it should be used in.
Make sure the command was copied 100% and the first or last letter was not copied the brackets (){} are supposed to be there.
Make sure you put the command into a powered repeating command block the purple one.