OH3:How can I display a weatherforecast in a grid?

Hi all
In the habpanel in OH2.5 I have used a template to show a html code to show the weatherforecast like this screenshot

Until now I haven’d found a way to show this in OH3
So I want to try to create a widget with two columns and 7 rows

All my trials are not successfull
I know, I have to use oh-row and oh-col
But I’m a novice with Yaml-Files

Does anybody have a example for me how to start?