Examine source code of triangles pattern 1

{
  "theme": {
    "images": {
      "theme_frame": "FRONT104AA.JPG"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "triangles pattern 1",
  "manifest_version": 2,
  "description": "pattern from <a href=\"https://outgoing.prod.mozaws.net/v1/520a15163bd132305041f8c31451078b0ae730d890e3266ddcf400c934b00625/http%3A//www.core77.com/blog/technology/\" rel=\"nofollow\">http://www.core77.com/blog/technology/</a>"
}