Examine source code of koi pond (animated)

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "koi pond theme",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(7, 36, 52)",
      "toolbar_text": "rgb(129, 233, 137)",
      "frame": "rgb(0, 26, 41)",
      "tab_background_text": "rgb(152, 221, 182)",
      "toolbar_field": "rgb(10, 56, 77)",
      "toolbar_field_text": "rgb(152, 221, 182)",
      "tab_line": "rgb(237, 89, 66)",
      "popup": "rgb(7, 36, 52)",
      "popup_text": "rgb(152, 221, 182)",
      "button_background_active": "rgb(0, 119, 134)",
      "button_background_hover": "rgb(20, 105, 68)",
      "frame_inactive": "rgb(7, 36, 52)",
      "icons_attention": "rgb(255, 157, 74)",
      "icons": "rgb(237, 89, 66)",
      "ntp_background": "rgb(0, 0, 0)",
      "ntp_text": "rgb(167, 255, 174)",
      "popup_border": "rgb(129, 233, 137)",
      "popup_highlight_text": "rgb(255, 255, 255)",
      "popup_highlight": "rgb(10, 82, 115)",
      "sidebar_border": "rgb(118, 199, 153)",
      "sidebar_highlight_text": "rgb(255, 255, 255)",
      "sidebar_highlight": "rgb(20, 105, 68)",
      "sidebar_text": "rgb(223, 255, 241)",
      "sidebar": "rgb(118, 199, 153)",
      "tab_background_separator": "rgb(0, 0, 0)",
      "tab_loading": "rgb(237, 89, 66)",
      "tab_selected": "rgba(10, 34, 45, 0.61)",
      "tab_text": "rgb(129, 233, 137)",
      "toolbar_field_highlight_text": "rgb(255, 255, 255)",
      "toolbar_field_highlight": "rgb(41, 119, 98)",
      "toolbar_top_separator": "rgba(10, 34, 45, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{703ad006-4a2b-41b1-94d2-f3ff14819f11}"
    }
  }
}