wordpress development block on Gutenberg Gutenberg

Good afternoon, on the wordpress site develop a block for gutenberg editor
Task: you need to make a section ,,see the image". Similar to the Gutenberg block ,,list of entries" so that you can add links to pages, not post, but page.
That is, it should be: select our created block from the list of blocks, a dark section should appear on the page (as in the image) there should be a Color Picker with the ability to select a gradient (if possible)
In this section there should be a title and description (through the if check) and the addition of pages (I will provide the layout of these blocks)
Oplpta through the exchange (the role of guarantor).
Rate your work