#container {
  display:                 flex;
  display:                 -webkit-flex; /* Safari 8 */
  flex-wrap:               wrap;
  -webkit-flex-wrap:       wrap;         /* Safari 8 */
  justify-content:         center;
  -webkit-justify-content: center;       /* Safari 8 */
}

.block {
  width:              180px;
  height:             240px;
  text-align: center;
  margin-top:		10px;
  margin-bottom: 10px;
  margin-left: 20px;
  margin-right: 20px;
}