<svg width="500"height="500">
<defs>
<linearGradient x1="0%"x2="%"y1="0%"y2="100%" id="tt">
<stop offset="0%" style="stop-color:orange"></stop>
<stop offset="100%" style="stop-color:tomato"></stop>
</linearGradient>
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<ellipse cx="200"cy="100"rx="120"ry="80"fill="url(#tt)"/>
</svg>