How do you put a Stained Glass Block on an Armor Stand's Head?

I've been working on a little armor stand Harry Potter vs Voldemort scene, just for fun, and I was trying to make the part where the two spells meet.

I figured out a way to do it, but I can't seem to get a red or green stained glass on the armor stand's head.

I've tried a few things.

/entitydata @e[type=armor_stand,r=1] {Equipment:[{},{},{},{},{id:stained_glass,Damage:14}]}
/entitydata @e[type=armor_stand,r=1] {Equipment:[{},{},{},{},{id:stained_glass 1 14}]}
/summon armor_stand ~ ~ ~ {Invisible:1,Equipment:[{},{},{},{},{id:stained_glass,Damage:14}]}

All of them with the same outcome: it said it worked, but it didn't do anything. I checked and there was no invisible armor stand summoned, and there definitely wasn't any red stained glass. Can anyone figure out why this wasn't working?

1 Answer

The Equipment list was updated in 1.9 to ArmorItems.

Your list also contains 4 empty brackets and then the item bracket. This is too many. The head slot is the 4th bracket set. This is probably because you were working with a pre 1.9 command to start with.

You are also missing Count to specify quantity.

I also specified data types by following the number value by the proper letter.

These commands have been tested and work properly in 1.12.2:

/entitydata @e[type=armor_stand,r=1] {Invisible:1b,ArmorItems:[{},{},{},{id:"minecraft:stained_glass",Damage:14b,Count:1b}]}
/summon armor_stand ~ ~ ~ {Invisible:1b,ArmorItems:[{},{},{},{id:"minecraft:stained_glass",Damage:14b,Count:1b}]}

3