* {
  margin: 0;
  padding: 0;
}

#ImgSet {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 100%;
  margin: auto;
}

#ImgSet li {
	list-style: none;
  margin-top: 150px;
}

#ImgSet img {
  display: block;
  width: 50%;
  margin: auto;
}

@media all and (min-width: 600px) {
  #ImgSet {
    flex-direction: row;
  }
}