var myX = 100, myY = 100, speed = 3;
var dist, dx, dy;
function d(x1, x2, y1, y2){
    return Math.sqrt((x1-x2)*(x1-x2) + (y1-y2)*(y1-y2))
}
function update() {
    dist = d(myX, mouseX, myY, mouseY);
    console.log(dist)
    dx = (mouseX-myX)/dist*speed;
    dy = (mouseY-myY)/dist*speed;
    myX += dx;
    myY += dy;
}

function draw() {
    // This is how you draw a rectangle
    context.fillRect(myX, myY, 30, 30);
};

function keyup(key) {
    // Show the pressed keycode in the console
    console.log("Pressed", key);
};

function mouseup() {
    // Show coordinates of mouse on click
    console.log("Mouse clicked at", mouseX, mouseY);
};