var Options = {
                title: 'Demo',
                isStacked: true,
                pieHole: 0.4,
                sliceVisibilityThreshold:0,
                colors: ['#c1c1c1','#0074AA','#1DB2F7','#F7941D' ],
                legendTextStyle: { color: '#1DB2F7' ,fontSize: 12},
                titleTextStyle: { color: '#1DB2F7',  alignment: 'center',fontSize: 15},
                chartArea: {width:510, height: 250} ,
                legend: { position: 'labeled' },
                pieStartAngle: 100,
                pieSliceTextStyle: {   fontSize:12  },

                };