Backpacks - Only One Command

Hello! Today, I've made useful backpacks that you can carry around, and they even let you craft things!

Click here for the command!

Crafting:
Backpack - Chest + Leather
All recipes are floor crafting

Tutorial:
Open the backpack by right clicking. Make sure you don't spam it, otherwise it may glitch.
All players have a different backpack inventory that is kept between every backpack, so if
you die, you can make another backpack and get your stuff back. Make sure you only use
the GetBackpack when you are close to the backpack. Stand on the backpack and look down
and quickly right click to access a crafting menu.

Credits:
By Code202

Notes:
For 1.9