image = new Array('one','two','three','four','five','six','nine','ten','thirteen','fourteen','sixteen');

var currentdate = 0, core = 0;
var ran = 60/image.length;

function ranimage() {
  currentdate = new Date();
  core = currentdate.getMinutes();
  core = Math.floor(core/ran);
    return(image[core]);
}

document.write('<div class="feature ' +ranimage()+ '"></div>');