Now that you have created your XBlock skeleton, myxblock, you need to make
it do something. This part of the tutorial explains modifying myxblock; for
practical purposes, we will update it to match the Thumbs XBlock that is
installed with the XBlock SDK.
For more information about the Thumbs XBlock, see Anatomy of an XBlock
For more information about the different components of an XBlock, see XBlock Concepts.