How can I create a canvas gradient that goes from left to right as opposed to top to down?

var lingrad = ctx.createLinearGradient(0,0,0,150);
 lingrad.addColorStop(0, '#00ABEB');
 lingrad.addColorStop(0.5, '#fff');
 lingrad.addColorStop(0.5, '#66CC00');
 lingrad.addColorStop(1, '#fff');

 ctx.fillStyle = lingrad;
 ctx.fillRect(10,10,780,130);

That one goes from top to down, what do I need to do to change that to go from left to right?

javascript html canvas
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