Examine source code of Polygons and Circles

{
  "theme": {
    "images": {
      "theme_frame": "crazycolors.jpg"
    },
    "colors": {
      "frame": "#0303fa",
      "tab_background_text": "#03fa1c"
    }
  },
  "version": "2.0",
  "name": "Polygons and Circles",
  "manifest_version": 2,
  "description": "Crazy Colors and Shapes"
}