<canvas
   id="Canvasobject2"
width="200"
height="200"
style="border: 2px solid #0000FF;">Ihr Browser unterstützt leider nicht das HTML5-Canvas-Element.
</canvas>

<script type="text/javascript">
var c = document.getElementById("Canvasobject2");
var cxt = c.getContext("2d");
cxt.fillStyle ="green";
cxt.moveTo(50,100);
cxt.lineTo(100,150);
cxt.lineTo(150,50);
cxt.lineTo(140,50);
cxt.lineTo(100,140);
cxt.lineTo(60,100);
cxt.lineTo(50,100);
cxt.closePath();
cxt.fill();
</script>