css background-color:black; background-image: radial-gradient(white, rgba(255,255,255,.2) 2px, transparent 40px), radial-gradient(white, rgba(255,255,255,.15) 1px, transparent 30px), radial-gradient(white, rgba(255,255,255,.1) 2px, transparent 40px), radial-gradient(rgba(255,255,255,.4), rgba(255,255,255,.1) 2px, transparent 30px); background-size: 550px 550px, 350px 350px, 250px 250px, 150px 150px; background-position: 0 0, 40px 60px, 130px 270px, 70px 100px;