For anyone who wants to find more information regarding treemaps, which are used in this application, this link https://www.cs.umd.edu/hcil/treemap-history/ htt

For anyone who wants to find more information regarding treemaps, which are used in this application, this link https://www.cs.umd.edu/hcil/treemap-history/ https://www.cs.umd.edu/hcil/treemap-history/ has some history about treemaps and here https://www.cs.umd.edu/hcil/treemap/demos/ https://www.cs.umd.edu/hcil/treemap/demos/ you can find a Java implementation where you can play