body{/*ソファー柄の背景(茶色)*/
background-size:100px 100px;
background-position:50px 50px,0 0,0 0,0 0;
background-color:#420;
background-image:
radial-gradient(#630 1px,#420 3px,#310 8px,#210 8px,rgba(68,34,0,0) 13px),
radial-gradient(#630 1px,#420 3px,#310 8px,#210 8px,rgba(68,34,0,0) 13px),
linear-gradient(45deg,rgba(0,0,0,0.3),rgba(68,34,0,0) 10%,rgba(68,34,0,0) 40%,rgba(255,127,0,0.1) 50%,rgba(0,0,0,0.3) 50%,rgba(68,34,0,0) 60%,rgba(68,34,0,0) 90%,rgba(255,127,0,0.1)),
linear-gradient(-45deg,rgba(0,0,0,0.3),rgba(68,34,0,0) 10%,rgba(68,34,0,0) 40%,rgba(255,127,0,0.1) 50%,rgba(0,0,0,0.3) 50%,rgba(68,34,0,0) 60%,rgba(68,34,0,0) 90%,rgba(255,127,0,0.1));
}