3 <canvas id=
"canvas" width=
"300" height=
"300">
5 var ctx
= document
.getElementById('canvas').getContext('2d');
7 var grad
= ctx
.createLinearGradient(0,-150,0,150);
8 grad
.addColorStop(1, '#0000ff');
9 grad
.addColorStop(1, '#ff0000');
12 ctx
.fillRect(0,0,300,300);