    <smil xmlns="http://www.w3.org/2001/SMIL20/Language">
        <head>
            <layout>
                <root-layout width="640" height="480" backgroundColor="white" />
                <region id="reg1"/>
                <region id="reg2" width="100px" height="100px" top="45px" left="45px" />
            </layout>
        </head>
        <body>
            <par dur="indefinite">
                <img id ="inst" src="../images/animateMotion_addsum_lin_b_accum.gif" region="reg1" />
                <img id="T1" src="../images/smile.jpg" region="reg2" />
                <animateMotion id="anim" begin="1s" dur="4s" calcMode="linear" targetElement="reg2" values="45,20;45,40;45,350" by="0,420" origin="parent" fill="hold" additive="sum" accumulate="none" repeatDur="8" />
            </par>
        </body>
    </smil>