It's not really clear what you're asking. Simply posting a photo of a screen and asking for code that creates it probably won't get you very far. Have you tried anything? Are you working with an example application? If you have nothing but a photo and just want someone to hand you code based on that photo, you're probably going to need to hire a developer.
As joetesta already said, we can't really help you when you just ask for code to accomplish this. Have a look at the different grids that Roku offers and play around with them. See if you can get items with different sizes to be rendered correctly.