The black box

I saw last time some black boxes on animal jam, for example in wolfwizard's den
I didnt know how to make it.
Untill i tried some things out, and i made some black boxes in my storage account.
Here is a pic my storages' den

Wanna know how to make it?

Ask me in animal jam then ill explain you.

Now on 22 december i made the black box glitch in my storage den better.

The other jammer on the picture is louietheman the black box is now much better.
Im wondering what black boxes ill make in the future.