background: repeating-linear-gradient(90deg, #f0f0f0 0, #f0f0f0 5%, transparent 0, transparent 50%) 0 / 15px 15px, repeating-linear-gradient(180deg, #f0f0f0 0, #f0f0f0 5%, transparent 0, transparent 50%) 0 / 15px 15px;