<div class="graph-paper"></div>

:root {
  --bg-color: #fff;
  --line-color-1: #366;
  --line-color-2: #a9a9a9;
}

body {
  height: 100vh;
  margin: 0;
}

.graph-paper {
  height: 100%;
  background-color: var(--bg-color);
  background-image: 
    conic-gradient(at calc(100% - 2px) calc(100% - 2px),var(--line-color-1) 270deg, #0000 0),
    conic-gradient(at calc(100% - 1px) calc(100% - 1px),var(--line-color-2) 270deg, #0000 0);
  background-size: 100px 100px, 20px 20px;
}