var banner = new Array();

banner[0]='https://i.imgur.com/3ACtz.jpg';
banner[1]='https://i.imgur.com/3PgqJ.png';
banner[2]='https://i.imgur.com/Jky1E.jpg';
banner[3]='https://i.imgur.com/NgMFS.jpg';
banner[4]='https://i.imgur.com/QMGVS.jpg';
banner[5]='https://i.imgur.com/cb8MQ.jpg';
banner[6]='https://i.imgur.com/Mpiny.png';
banner[7]='https://i.imgur.com/rl29T.png';
banner[8]='https://i.imgur.com/xTVnV.jpg';
banner[9]='https://i.imgur.com/QUpbP.jpg';
banner[10]='https://i.imgur.com/QJzO2.jpg';
banner[11]='https://i.imgur.com/C88uu.jpg';
banner[12]='https://i.imgur.com/qJI5r.png';
banner[13]='https://i.imgur.com/GHvMz.png';
banner[14]='https://i.imgur.com/V8Svv.png';
banner[15]='https://i.imgur.com/K5tBg.jpg';
banner[16]='https://i.imgur.com/U1C9C.jpg';
banner[17]='https://i.imgur.com/7bLOf.jpg';
banner[18]='https://i.imgur.com/XURbJ.jpg';

document.getElementById('logo').firstChild.src= banner[Math.floor(Math.random()*banner.length)];