Arkadaslar mousela kücük resimlerin üzerine gelince play buttonu cikmasini istiyorum nasil yaparim?

.post{margin:.5em 0 0em;padding:15px}
.post h3{font:16px Oswald;line-height:1em;margin:0 0 8px;padding:0}
.post img{ border:5px solid #111;transition:all 400ms ease-in-out;-webkit-transition:all 400ms ease-in-out;-moz-transition:all 400ms ease-in-out;-o-transition:all 400ms ease-in-out;-ms-transition:all 400ms ease-in-out;}
.post img:hover{ opacity:.7;filter:alpha(opacity=80);-moz-opacity:.8;-khtml-opacity:.7}
.post-footer{display:none}
#blog-pager a{color:#333}
.bar{background:#e6e6e6 url(http://4.bp.blogspot.com/-PE4DGGi62Rc/UAV05DVyMbI/AAAAAAAAHrQ/acf9emv3Od4/s1600/bar-bg2.png) repeat-x top;list-style:none;width:156px;margin:10px 0 0 9px;text-align:center;height:170px;display:inline;float:left;overflow:hidden;position:relative;padding:2px 3px 5px;border:1px solid #c9c9c9;-moz-border-radius:5px;-webkit-border-radius:5px;border-radius:5px;}
.bar h3{height:20px;border:0 none;line-height:8px;margin:0 5px 5px;padding:2px;text-shadow:0px 2px 2px #fff}
.bar h3 a{font:14px PT Sans Narrow;text-align:center;line-height:16px}
.bar h3 a:hover{color:#c1541a}
.bar .post-body{background:none;height:175px;overflow:hidden;width:167px;padding:0px;margin:0 0 .3cm;}
.bar img{border:5px solid #999;margin:15px 6px}