Выводить рандомные числа в графике

Morris.Bar({ 
 element : 'chart1', 
 data:[{ year:'2001', profit:203, purchase:503, sale:203}, { year:'2002', profit:203, purchase:203, sale:203}, { year:'2003', profit:203, purchase:203, sale:203}, { year:'2004', profit:203, purchase:203, sale:203}, { year:'2005', profit:203, purchase:203, sale:203}, { year:'2006', profit:203, purchase:203, sale:203}, { year:'2007', profit:203, purchase:203, sale:203}, { year:'2008', profit:203, purchase:203, sale:203}, { year:'2009', profit:203, purchase:203, sale:203}, { year:'2010', profit:203, purchase:203, sale:203}],   
 xkey:'year', 
 ykeys:['profit', 'purchase', 'sale'], 
 labels:['Profit', 'Purchase', 'Sale'], 
 hideHover:'auto', 
 behaveLikeLine: true, 
 resize:true, 
  gridTextColor: ['black'], 
  gridTextSize: ['15'],     
  barColors: ['#ff6d6d', '#3333ff','#6d6d93'],     
}); 
 
getRandomArbitrary = (min, max) => Math.random() * (max - min) + min; 
 
var timerId = setInterval(function() { 
  let data = chart.data[0].data; 
  data.forEach((num, index) => { 
    return data[index] = getRandomArbitrary(0, 1000);; 
  }); 
  chart.update(5000); 
}, 3000);

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