Flash content is getting blocked in the latest versions of browsers. To enable it in Google Chrome,
first open your browser and type chrome://settings/content/flash in the address bar or go there from
menu "Settings / Privacy and security / Site settings / Flash". On a flash setting page, set toggle
to Ask first (recommended). Now, with Flash enabled, whenever you visit a webpage with Flash content,
you’ll need to click on the Flash player for it to start.
Here is a track of dance of which you must raise all the flagstones. For that, select a flagstone, if it is in bottom, it will go up, if it is in top, it will bend down; but that will also influence all the adjacent flagstones. With you to play!