Draw a 150*100 pixels rectangle, and fill it with the color red:
Internet Explorer 9, Firefox, Opera, Chrome, and Safari support the fill() method.
Note: Internet Explorer 8 and earlier versions, do not support the <canvas> element.
The fill() method fills the current drawing (path). The default color is black.
Tip: Use the fillStyle property to fill with another color/gradient.
Note: If the path is not closed, the fill() method will add a line from the last point to the startpoint of the path to close the path (like closePath()), and then fill the path.
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