html5 drag&drop + php interaction

I have a site that uses a grid of NxN blocks, when opening the page these are filled according to content from database, the order will be stored on database. I want you to make it possible to arrange the order and save the order to the server each time a move is made. Also file upload should be possible to make directly to the grid, uploading it to database and showing the result as a new block in the grid. the reward is 15 $ exactly, not a cent more not a cent less