How to use oh:repeater

I want to use oh:repeater. There are several exciting examples in A couple of simple oh-repeater examples.

But where to start? Can i create this with the gui?

See Pages - Custom Widgets | openHAB for how to create a custom widget. Once created it will show up in that list you show there.

Also look at the marketplace. Many widgets (including the ones in that oh-repeater posting) can be just installed and used from there.

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ah, thanks.
Can you give me another hint? I like your example “all lights”.
How can i filter light with status on?

I solved it myself:

loop.item.state == "ON"