function drawBasic() {
        var xValue = Number(document.getElementById("xValue").value);
        var yValue = Number(document.getElementById("yValue").value);
        var data = new google.visualization.DataTable();
        data.addColumn('number', 'X');
        data.addColumn('number', 'Packet');


            data.addRows([[xValue, yValue]]);

            var options = {
                hAxis: {
                    title: 'Time'
                },
                vAxis: {
                    title: 'Packet'
                }
            };

            var chart = new google.visualization.LineChart(document.getElementById('chart_div'));
            chart.draw(data, options);
    }

</script>