Unity-1.6.2 (The April Fools Update) is a release file of the Minecraft resource pack Unity, made for Minecraft 1.12.1, 1.12, 1.12.2. It was published on April 1, 2018 and is 14.7 MB in size. For the full description, screenshots and every other version, visit the Unity resource pack page.
How to install: Put the .zip into .minecraft/resourcepacks (do not extract it) and enable it under Options → Resource Packs.