/* Draw Rectangle */
var ctx = document.getElementById("myCanvas").getContext("2d");
ctx.fillStyle = "#FF0000";
ctx.fillRect(0, 0, 150, 75);
/* Draw Line */
ctx.moveTo(10, 10);
ctx.lineTo(190, 90);
ctx.stroke();
/* Draw Circle */
ctx.beginPath();
ctx.arc(95, 50, 40, 0, 2 * Math.PI);
ctx.strokeStyle = '#0000ff';
ctx.stroke();
/* Draw Gradient Rectangle */
// Create gradient
var grd = ctx.createLinearGradient(0, 0, 200, 0);
grd.addColorStop(0, "red");
grd.addColorStop(1, "white");
// Fill with gradient
ctx.fillStyle = grd;
ctx.fillRect(10, 110, 150, 180);
/* Draw Text */
ctx.fillStyle = "#00FF00";
ctx.font = "30px Arial";
ctx.strokeStyle = '#808080';
ctx.fillText("Hello World", 10, 150);
ctx.strokeText("Hello World", 10, 90);
<canvas id="myCanvas" width="200" height="600"></canvas>