Ovale

<div id="ell"><input id="mg1" class="mg" src="https://ekladata.com/-1CQkbDgGRe6ntjVjtSxhZQKW2s.jpg" type="image" /> <input id="mg2" class="mg" src="https://ekladata.com/FLNm9wfFQbtGLRhbOLLDQVjLqpE.jpg" type="image" /> <input id="mg3" class="mg" src="https://ekladata.com/MwxIr6Xhru3jjHEJLtlr0elyawU.jpg" type="image" /> <input id="mg4" class="mg" src="https://ekladata.com/bilBNG73XBB9ftUAYPOiexqrn_8.jpg" type="image" /> <input id="mg5" class="mg" src="https://ekladata.com/VxgE8JT63YXaOkUXctre0goiBlc.jpg" type="image" /> <input id="mg6" class="mg" src="https://ekladata.com/080drmBx1vkxC_0LQvn7LFEcIFQ.jpg" type="image" /> <input id="mg7" class="mg" src="https://ekladata.com/EAx4stwYQbaG-Eabz51BflNSLvI.jpg" type="image" />
<p id="rev">&nbsp;</p>
<p id="cvb">CLIC</p>
</div>
<style><!--
#ell{position:relative; overflow:hidden; width:1200px; height:675px; border-radius:50%; margin:50px auto; text-align:left; border:10px ridge brown;}
.mg{position:absolute; z-index:2; width:600px; height:336px; border:6px ridge white; transition:all 1s;}
#mg1{box-sizing:border-box; transform:translate(350px,170px);}
#mg2{box-sizing:border-box; transform:translate(0px,-166px);}
#mg3{box-sizing:border-box; transform:translate(600px,-166px);}
#mg4{box-sizing:border-box; transform:translate(-250px,170px);}
#mg5{box-sizing:border-box; transform:translate(950px,170px);}
#mg6{box-sizing:border-box; transform:translate(0px,506px);}
#mg7{box-sizing:border-box; transform:translate(600px,506px);}
#rev{position:absolute; z-index:1; width:1200px; height:675px; border-radius:50%;}
#cvb{position:absolute; z-index:2; width:100px; height:30px; font-size:30px; color:white; text-shadow:2px 2px black; transform:translate(570px,200px);}
.mg:focus~#rev{z-index:10;}
#mg1:focus,#mg2:focus,#mg3:focus,#mg4:focus,#mg5:focus,#mg6:focus,#mg7:focus{z-index:5; width:1220px; height:695px; transform:translate(-10px,-10px);}
--></style>