body{/*入れ子菱の背景*/
background-size:52px 30px;
background-position:26px 15px,26px 15px,0 0,0 0,0 0;
background-image:
linear-gradient(30deg,#789 6%,#fff 6%,#fff 8%,#789 8%,#789 15%,#fff 15%,#fff 17%,#789 17%,#789 24%,#fff 24%,#fff 26%,transparent 26%),
linear-gradient(-150deg,#789 6%,#fff 6%,#fff 8%,#789 8%,#789 15%,#fff 15%,#fff 17%,#789 17%,#789 24%,#fff 24%,#fff 26%,transparent 26%),
linear-gradient(30deg,#789 6%,#fff 6%,#fff 8%,#789 8%,#789 15%,#fff 15%,#fff 17%,#789 17%,#789 24%,#fff 24%,#fff 26%,transparent 26%),
linear-gradient(-150deg,#789 6%,#fff 6%,#fff 8%,#789 8%,#789 15%,#fff 15%,#fff 17%,#789 17%,#789 24%,#fff 24%,#fff 26%,transparent 26%),linear-gradient(150deg,#789 6%,#fff 6%,#fff 8%,#789 8%,#789 15%,#fff 15%,#fff 17%,#789 17%,#789 24%,#fff 24%,#fff 26%,#789 26%,#789 33%,#fff 33%,#fff 35%,#789 35%,#789 42%,#fff 42%,#fff 44%,#789 44%,#789 56%,#fff 56%,#fff 58%,#789 58%,#789 65%,#fff 65%,#fff 67%,#789 67%,#789 74%,#fff 74%,#fff 76%,#789 76%,#789 83%,#fff 83%,#fff 85%,#789 85%,#789 92%,#fff 92%,#fff 94%,#789 94%);
}