HTML5 canvas tile based map not showing up

// Declares global variables
var canvas = document.createElement("canvas");
    c = canvas.getContext("2d"),
    make = {},
    maps = {},
    width = 800,
    height = 600;

// Creates the requestAnimationFrame variable
(function () {
    var requestAnimationFrame = window.requestAnimationFrame || window.mozRequestAnimationFrame || window.webkitRequestAnimationFrame || window.msRequestAnimationFrame;
    window.requestAnimationFrame = requestAnimationFrame;
}) ();

// Modifies the canvas' properties
canvas.width = width,
canvas.height = height;

// 2D arrays that make up maps
maps = {
    one: [
    ["w","w","w","w","w","w","w","w"],
    ["w","o","o","o","o","o","o","w"],
    ["w","o","w","w","w","w","o","w"],
    ["w","o","w","o","o","o","o","w"],
    ["w","o","w","o","w","o","o","w"],
    ["w","o","w","o","o","w","o","w"],
    ["w","o","o","o","o","o","o","w"],
    ["w","w","w","w","w","w","w","w"]
    ],

    two: [
    ["w","w","w","w","w","w","w","w"],
    ["w","o","o","o","o","o","o","w"],
    ["w","o","o","o","o","o","o","w"],
    ["w","o","o","o","o","o","o","w"],
    ["w","o","o","o","o","o","o","w"],
    ["w","o","o","o","o","o","o","w"],
    ["w","o","o","o","o","o","o","w"],
    ["w","w","w","w","w","w","w","w"]
    ]
};

// Maps drawing functions
make = {
    map: function ( map2d ) {
        var i,
            j,
            tile,
            tilesX = 8,
            tilesY = 8;

        for (i = 0; i < tilesX; i++) {
            for(j = 0; j < tilesY; j++) {
                if (map2d[i][j] === "w") {
                    this.tile(i * 64, j * 64);
                }
            }
        }
    },

    tile: function (x, y, TD) {
        switch (TD) {
            case "w":
                c.rect(x, y, 64, 64);
                c.fillStyle = wallColor;
                c.fill();
                c.lineWidth = 8;
                c.strokeStyle = "black";
                c.stroke();
                break;

            case "o":
                c.rect(x, y, 64, 64);
                c.fillStyle = "white";
                c.fill();
                c.lineWidth = 8;
                c.strokeStyle = "white";
                c.stroke();
                break;
        }
    }
}

// Updates constantly
function update () {
    c.clearRect(0, 0, width, height);
    make.map(maps.two);
    requestAnimationFrame(update);
}

// Begins updating when window is ready
window.addEventListener("load", function () {
    update();
});