[css] 웹페이지 배경에 눈금자 만들기

body {
  background-size: 50px 50px;
  background-image:
    linear-gradient(to right, #dfdfdf 1px, transparent 1px),
    linear-gradient(to bottom, #dfdfdf 1px, transparent 1px);
}

body {
  background-size: 50px 50px;
  background-image: radial-gradient(circle, #000000 1px, rgba(0, 0, 0, 0) 1px);
}