body{
    background-image: repeating-radial-gradient(circle at center center, transparent 0px, transparent 13px,rgba(0,0,0,0.03) 13px, rgba(0,0,0,0.03) 24px,transparent 24px, transparent 62px,rgba(0,0,0,0.03) 62px, rgba(0,0,0,0.03) 96px),repeating-radial-gradient(circle at center center, rgb(255,255,255) 0px, rgb(255,255,255) 14px,rgb(255,255,255) 14px, rgb(255,255,255) 18px,rgb(255,255,255) 18px, rgb(255,255,255) 28px,rgb(255,255,255) 28px, rgb(255,255,255) 32px); background-size: 21px 21px;
}