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rotate.js Example File
script/context2d/scripts/rotate.js

 var ctx = document.getElementById('tutorial').getContext('2d');
   ctx.translate(75,75);

   for (i=1;i<6;i++){ // Loop through rings (from inside to out)
     ctx.save();
     ctx.fillStyle = 'rgb('+(51*i)+','+(255-51*i)+',255)';

     for (j=0;j<i*6;j++){ // draw individual dots
       ctx.rotate(Math.PI*2/(i*6));
       ctx.beginPath();
       ctx.arc(0,i*12.5,5,0,Math.PI*2,true);
       ctx.fill();
     }

     ctx.restore();
   }