context.lineTo(canvasWidth, canvasHeight/2);
context.lineTo(canvasWidth*2/3, canvasHeight);
context.lineTo(canvasWidth*2/3, canvasHeight*2/3);
context.lineTo(0, canvasHeight*2/3);
context.lineTo(0, canvasHeight/3);
context.closePath();
context.stroke();
context.fill();
return canvas.getCanvasElement();
}