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<!DOCTYPE html> <html> <body> <canvas id="myCanvas" width="300" height="150" style="border:1px solid #d3d3d3;"> Your browser does not support the HTML5 canvas tag.</canvas> <script type="text/javascript"> var c=document.getElementById("myCanvas"); var ctx=c.getContext("2d"); ctx.shadowBlur=10; ctx.shadowOffsetX=20; ctx.shadowColor="black"; ctx.fillStyle="blue"; ctx.fillRect(20,20,100,80); </script> </body> </html>