SVG Path animation

Question

How can I animate SVG path? This code doesn't work!?
<svg width="500" height="500">
<path d="M 0 0 L200 200 L200 0 Z" style="stroke:#000; fill:none;" >
<animate attributeName="x" from="0" to="300"
dur="3s" fill="freeze" repeatCount="2"/>
</path>
</svg>

Answer 1

https://code.sololearn.com/WaUNlKqVP87R/?ref=app