<?xml version="1.0" standalone="no"?>
<svg width="8cm" height="8cm" viewBox="0 0 400 400"
    xmlns="http://www.w3.org/2000/svg"
    xmlns:xlink="http://www.w3.org/1999/xlink/"
    baseProfile="tiny" version="1.2">
  <title>Spheres</title>
  <desc>Gradient filled spheres with different colors.</desc>
    <defs>
      <!-- Create radial gradients for each circle to make them look like
           spheres. -->
      <radialGradient id="blueSphere" gradientUnits="userSpaceOnUse"
                      cx="0" cy="0" r="100" fx="-50" fy="-50">
        <stop offset="0%" stop-color="white" />
        <stop offset="75%" stop-color="blue" />
        <stop offset="100%" stop-color="#222244" />
      </radialGradient>
      <radialGradient id="redSphere" gradientUnits="userSpaceOnUse"
                      cx="0" cy="0" r="100" fx="-50" fy="-50">
        <stop offset="0%" stop-color="white" />
        <stop offset="75%" stop-color="red" />
        <stop offset="100%" stop-color="#442222" />
      </radialGradient>
      <radialGradient id="greenSphere" gradientUnits="userSpaceOnUse"
                      cx="0" cy="0" r="100" fx="-50" fy="-50">
        <stop offset="0%" stop-color="white" />
        <stop offset="75%" stop-color="green" />
        <stop offset="100%" stop-color="#113311" />
      </radialGradient>
      <radialGradient id="yellowSphere" gradientUnits="userSpaceOnUse"
                      cx="0" cy="0" r="100" fx="-50" fy="-50">
        <stop offset="0%" stop-color="white" />
        <stop offset="75%" stop-color="yellow" />
        <stop offset="100%" stop-color="#444422" />
      </radialGradient>
      <radialGradient id="shadowGrad" gradientUnits="userSpaceOnUse"
                      cx="0" cy="0" r="100" fx="-50" fy="50">
        <stop offset="0%" stop-color="black" stop-opacity="1.0" />
        <stop offset="100%" stop-color="white" stop-opacity="0.0" />
      </radialGradient>

      <!-- Define a shadow for each sphere. -->
      <circle id="shadow" fill="url(#shadowGrad)" cx="0" cy="0" r="100" />
    </defs>
  <g fill="#ffee99" stroke="none" >
    <rect x="0" y="0" width="400" height="400" />
  </g>
  <g fill="white" stroke="none" >
    <rect x="0" y="175" width="400" height="225" />
  </g>
  <g transform="translate(200,175)">
    <use xlink:href="#shadow" transform="translate(25,55) scale(1.0,0.5)" />
    <circle fill="url(#blueSphere)" cx="0" cy="0" r="100" />
  </g>
  <g transform="translate(315,240)">
    <g transform="scale(0.5,0.5)">
      <use xlink:href="#shadow" transform="translate(25,55) scale(1.0,0.5)" />
      <circle fill="url(#redSphere)" cx="0" cy="0" r="100" />
    </g>
  </g>
  <g transform="translate(80,275)">
    <g transform="scale(0.65,0.65)">
      <use xlink:href="#shadow" transform="translate(25,55) scale(1.0,0.5)" />
      <circle fill="url(#greenSphere)" cx="0" cy="0" r="100" />
    </g>
  </g>
  <g transform="translate(255,325)">
    <g transform="scale(0.3,0.3)">
      <use xlink:href="#shadow" transform="translate(25,55) scale(1.0,0.5)" />
      <circle fill="url(#yellowSphere)" cx="0" cy="0" r="100" />
    </g>
  </g>
</svg>