This is a very basic visual introduction to the concepts behind a blockchain. We introduce the idea of an immutable ledger using an interactive web demo.
Part 2 is here: https://youtu.be/xIDL_akeras
If you are interested in playing with this on your own, it is available online at:
The code that runs this demo is also on GitHub:
I'm @anders94 on Twitter and @andersbrownworth on Steemit.