body{background: red;
background: -webkit-linear-gradient(left,red,orange,yellow,green,blue,indigo,violet); 
background: -o-linear-gradient(left,red,orange,yellow,green,blue,indigo,violet); 
background: -moz-linear-gradient(left,red,orange,yellow,green,blue,indigo,violet); 
background: linear-gradient(to right, red,orange,yellow,green,blue,indigo,violet);
}

.plain div {
    white-space: pre-line;
}