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<html><body><h2>Rectangle that fades away</h2><svg width="400" height="280"> <rect x="20" y="20" width="250" height="250" style="fill:blue"> <animate attributeType="CSS" attributeName="opacity" from="1" to="0" dur="5s" repeatCount="indefinite" /> </rect> Sorry, your browser does not support inline SVG. </svg><p><strong>Note:</strong> This example does not work in Firefox.</p></body></html>