Chartjs-Chartjs inner separation

Solved this scenario by adding multiple dataset for pie chart 
Code:
 var chartData = {
            labels: [],
            datasets: [{
                label: ["Fail", "Pass"],

                data: [24, 76],
                backgroundColor: [
                  "#FF0000",
                 "#90EE90"
                ],

            }, {
                label: ["C1", "C2", "C3", "C4", "C5", "C6", "C7", "Total"],

                data: [0.5, 0.12, 0.25, 0.40, 0.22, 0.36,5.6],
                backgroundColor: [
                  "#766757",
                  "#FCB441",
                  "#E0400A",
                  "#056492",
                  "#BFBFBF",
                  "#1A3B69",
                  "#90EE90"
                ],

            }]
        };
        var options = {

            legend: false,


        }
        var pieChart = new Chart(ctx, {
            type: 'pie',
            data: chartData,
            options: options



        });