Animated drawing using the setInterval() function on canvas

A simple example of an animated drawing on the canvas in Tizen 2.3 using the setInterval() function. 
<!DOCTYPE HTML>
<html>
  <head>
    <style>
      body {
        margin: 0px;
        padding: 0px;
      }
    </style>
  </head>
  <body>
    <canvas id="myCanvas" width="600" height="300"></canvas>
    <script>

        var startX = 20;
        var startY = 100;
        
        var canvas = document.getElementById('myCanvas'); 
        var ctx = canvas.getContext('2d'); 
        
        var moveCircle = setInterval(animate, 30);
        
        function animate() {

            if (startX < 580)
            {
                ctx.fillStyle = 'red';
                ctx.beginPath(); 
                ctx.arc(startX, startY, 10, 0 * Math.PI, 2 * Math.PI); 
                ctx.fill();

                startX++;
            }
            
        }
      
   </script>
  </body>
</html>
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