<?xml version="1.0"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.0//EN"
    "http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd">

<svg width="300" height="150">

<circle cx="60" cy="60" r="30"
      style="stroke: gray; fill: #ff9; stroke-width: 10;">

    <animateColor attributeName="fill"
             from="#ff9" to="red" begin="2s" dur="4s" repeatCount="indefinite"/>
    <animateColor attributeName="stroke"
             from="grey" to="blue" begin="2s" dur="4s" repeatCount="indefinite"/>
 </circle>

</svg>