dvd animation

var cursor = {
    pos: {x: 0, y: 0},
    vel: {x:.1, y: .1},
    mode: "vsine",
    g: -.05,
    a: 1,
    follower: ""
};

//mouse animation
var cursorupdate = setInterval(function() {
    if (cursor.pos.x > 100 || cursor.pos.x < 0) {
                cursor.vel.x = -cursor.vel.x;
            }
            if (cursor.pos.y > 100 || cursor.pos.y < 0) {
                cursor.vel.y = -cursor.vel.y;
            }
            cursor.pos.x += cursor.vel.x;
            cursor.pos.y += cursor.vel.y;
MPP.client.sendArray([{m:'m', x: cursor.pos.x, y: cursor.pos.y}])}, 50)