How to insert a new value in pie chart?

Questions about Thunkable
1
google.charts.load('current', {'packages':['corechart']}); google.charts.setOnLoadCallback(drawChart); 
  function drawChart() {

    var data = google.visualization.arrayToDataTable([
      ['Task', 'Hours per Day'],
      ['Work',     11],
      ['Eat',      2],
      ['Commute',  2],
      ['Watch TV', 2],
      ['Sleep',    7]
    ]);

    var options = {
      title: 'My Daily Activities'
    };

    var chart = new google.visualization.PieChart(document.getElementById('piechart'));

    chart.draw(data, options);
  }
</script>
[/quote]

Can you give advice for me to making a block plz.