If you have already clicked on this page, reload it.

Use your pointing device to slowly drag a file from your system's file manager, over the orange square (ensure that this is the first part of the page that you drag the file over, not an otherwise blank part of the page), then the pink square, then the yellow square, then the blue square, and release it over the blue square (make sure the mouse remains over each square for at least 1 second, and over the gaps between squares for at least 1 second). If a prompt appears, accept it. Fail if no new text appears below.