Canvas matrix

mat.js

window.onload = function () {
    var canvas = document.getElementById('myCanvas');
    var context = canvas.getContext('2d');

    context.beginPath();

    for (var i=100; i<= 200; i += 25) {

	context.moveTo(i, 50);
	context.lineTo(i, 150);
	context.moveTo(100, i-50);
	context.lineTo(200, i-50);
	context.stroke();
    }
};