body{/*ソファー柄の背景(紫)*/
background-size:100px 100px;
background-position:50px 50px,0 0,0 0,0 0;
background-color:#808;
background-image:
radial-gradient(#b0b 1px,#909 3px,#606 8px,#707 8px,rgba(136,0,136,0) 13px),
radial-gradient(#b0b 1px,#909 3px,#606 8px,#707 8px,rgba(136,0,136,0) 13px),
linear-gradient(45deg,rgba(0,0,0,0.1),rgba(136,0,136,0) 10%,rgba(136,0,136,0) 40%,rgba(255,0,255,0.2) 50%,rgba(0,0,0,0.1) 50%,rgba(136,0,136,0) 60%,rgba(136,0,136,0) 90%,rgba(255,0,255,0.2)),
linear-gradient(-45deg,rgba(0,0,0,0.1),rgba(136,0,136,0) 10%,rgba(136,0,136,0) 40%,rgba(255,0,255,0.2) 50%,rgba(0,0,0,0.1) 50%,rgba(136,0,136,0) 60%,rgba(136,0,136,0) 90%,rgba(255,0,255,0.2));
}