how to make a downlaod button in html code example

Example: how to add stylish download buttom

/* CSS Button Style 1 by indzign.blogspot.com */
.button{float:left;list-style:none;text-align:center;width:95%;margin:10px;padding:2px;font-size:14px;clear:both}
.button ul{margin:0;padding:0}
.button li{display:inline;margin:5px;padding:0;list-style:none}
.button li a.demo,.button li a.download{position:relative;padding:9px 48px 9px 16px;background:#f39c12;color:#fff!important;font-weight:700;font-size:14px;text-align:center;text-transform:uppercase;letter-spacing:0.5px;border-radius:3px;box-shadow:0 1px rgba(0,0,0,0.1);line-height:normal;transition:all .3s}
.button li a.download{background:#3498db}
.button li a.demo:hover,.button li a.download:hover{background:#666}
.button li a.demo:active,.button li a.download:active{cursor:pointer}
.button li a.demo:after,.button li a.download:after{content:'\f135';background:rgba(0,0,0,0.1);position:absolute;right:0;top:0;font-weight:normal;display:inline-block;margin:0 0 0 10px;color:#fff;padding:11px;font-family:fontawesome}
.button li a.download:after{content:'\f019'}