Drag and drop in ren py

Anyone knows how to use the drag and drop for renpy?

i dont understand it well so if any one could explain it :)

im trying to do a code where when you click an image, it changes to another image and then you can drag it to a certain place and theeeeen it goes to the next label or somethin. just ownderedwooajdahvlHSBflcJBSD