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var ctx = canvas.getContext('2d');
var w = 545;
var h = 350;
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canvas.height = h;
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ctx.rect(0,0,w,h);
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ctx.fill();
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img.src = 'https://img.webme.com/pic/o/okulsa/s1.png';
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{
ctx.drawImage(img, 0, 0,100,110);
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