span#t {
  border: 2px solid powderblue;
  padding: 30px;
  height: 32px;
  width: 80px;
  display: inline-block;
}

div#pics>div:nth-of-type(odd) {
  background: #f0f0f0;
}
div#pics>div:nth-of-type(even) {
  background: #d0d0d0;
}