Gauage chart using Amcharts

gauageChart.js

AmCharts.makeChart("chartdiv",
  {
    "type": "gauge",
    "theme": "light",
    "arrows": [
      {
        "id": "GaugeArrow-1"
      },
      {
        "id": "GaugeArrow-2"
      },
      {
        "id": "GaugeArrow-3"
      }
    ],
    "axes": [
      {
        "axisThickness": 1,
        "bottomText": overall +" %",
        "bottomTextYOffset": -20,
        "endValue": 100,
        "id": "GaugeAxis-1",
        "valueInterval": 10,
        "bands": [
          {
            "color": "#ea3838",
            "endValue": 75,
            "id": "GaugeBand-1",
            "startValue": 0
          },
          {
            "color": "#ffac29",
            "endValue": 90,
            "id": "GaugeBand-2",
            "startValue": 75
          },
          {
            "color": "#00CC00",
            "endValue": 100,
            "id": "GaugeBand-3",
            "innerRadius": "95%",
            "startValue": 90
          }
        ]
      }
    ],
    "allLabels": [],
      "balloon": {},
      "titles": [
        {
          "id": "Title-1",
          "size": 15,
          "text": "Over All Code Coverage"
        }
      ],
      "arrows": [
        {
          "value": overall 
        }
      ]
    }
  );