Custom Inventory, need help!

For about 2 years now, I’ve always wondered on how people made custom Toolboxes or inventories and I still to this day cant find a way to make one like that.

For example, this is what I kind of want as a custom Inventory GUI, all round and clean looking.
If anyone has any idea on how to do this, let me know.

Have an amazing day!
image

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This video will help:

1 Like

Maybe this will help