Grid layout

<div class="images">
  <img class="first" src="3.png" alt="" />
  <img class="second" src="7.png" alt="" />
  <img src="2.png" alt="" />
  <img class="third" src="4.png" alt="" />
  <img class="fourth" src="6.png" alt="" />
  <img src="1.png" alt="" />
  <img src="5.png" alt="" />
</div>

.images {
  width: 50%;
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(3, 1fr);
}

.first {
  grid-row: 1/2;
}

.second {
  grid-row: 2/3;
}

.third {
  grid-row-start: 2;
  grid-row-end: 3;
}

.fourth {
  grid-row-start: 3;
  grid-column-start: 2;
}