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<!DOCTYPE html> <html> <head> <title>Canvas Simple Example</title> </head> <body> <!-- Start your code here --> <canvas width="150" height="150" id="canvas"></canvas> <!-- End your code here --> </body> </html>
canvas { border: 1px solid red; }
window.addEventListener("load", function() { function draw() { var canvas = document.getElementById("canvas"); if (canvas.getContext) { var ctx = canvas.getContext("2d"); ctx.fillStyle = "rgb(200,0,0)"; ctx.fillRect (10, 10, 55, 50); ctx.fillStyle = "rgba(0, 0, 200, 0.5)"; ctx.fillRect (30, 30, 55, 50); } } draw(); });