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spheres.svg Example File
painting/svgviewer/files/spheres.svg

 <?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>