input{height:10px;width:15%;-webkit-appearance:none;-moz-appearance:none;appearance:none;transition:color .05s linear;background:linear-gradient(to right,red,#ff0,#0f0,#0ff,#00f,#f0f,red);border-radius:15px;position:absolute;bottom:2%;right:1%}body{background:#000;margin:0;overflow:hidden}