linear-gradient-1b.html
<!doctype html>
<body>
<canvas id="canvas" width="300" height="300">
<script>
var ctx = document.getElementById('canvas').getContext('2d');
var grad = ctx.createLinearGradient(0,-150,0,150);
grad.addColorStop(1, '#0000ff');
grad.addColorStop(1, '#ff0000');
ctx.fillStyle = grad;
ctx.fillRect(0,0,300,300);
</script>
</body>
