How to get a custom player head in Minecraft 1.14 [Works on all versions]

This is my tutorial on how to get custom skin heads in-game in Minecraft 1.8. Hope it helps you!

First off, you will need to get a command block, with /give [username here] command_block or just simply type in the / hey. Then, you will type in the following code. but with one note: replace [username] with the username of the player in which you want to get thier head. BTW this works for any version from 1.8 - current