Each ball represents a page. Each arrow represents a link from one page to another. In each iteration, you can move from the current page to a page it links to. For example, the pink page links to both the yellow page and the purple page so there's an equal chance you could go to either yellow or purple after pink. Each time you "visit" a page, the ball will get bigger. Bigger pages represent more visited (or "popular") pages. Before playing the program, take a guess: Which pages do you think will be visited the most?
PageRank: http://infolab.stanford.edu/~backrub/google.html Inspired by this activity: https://www.teachengineering.org/activities/view/csm-2353-acting-algorithm-google-pagerank-activity