document.write('<div id="wall">');
document.write('<div class="grid">');
for(i=0; i < 3; i++) {
    document.write('<ul class="grid-inner">');
    document.write('<li><img class="blank" src="" alt="" /></li>');
    document.write('<li><img class="blank" src="" alt="" /></li>');
    document.write('<li><img class="blank" src="" alt="" /></li>');
    document.write('<li><img class="blank" src="" alt="" /></li>');
    document.write('<li><img class="blank" src="" alt="" /></li>');
    document.write('</ul>');
}
document.write('</div>');
document.write('</div>');