Main UI coding

I’ve just upgraded my OH to 3 and started to work on the new main UI.
Could you please share with me some tutorials and documentation to get needed knowledge and skills to code personalised widgets.
Thanks in advance,

Do you know the demo that was done at the user meetup:

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Thanks for your reply.
I’ve seen it . Interesting :+1:
For the moment I need to learn how to code new widgets ( syntax, expressions,…).


Maybe this could help you, finding a starting point