*{
  padding: 0;
  margin: 0;
}
.card1x2{
  display: grid;
  grid-template-rows: repeat(2,1fr);
}

.card2x2{
  display: grid;
  grid-template-columns:  repeat(2,1fr);
  grid-template-rows: repeat(2,1fr);
}

.card4x4{
  display: grid;
  grid-template-columns:  repeat(4,1fr);
  grid-template-rows: repeat(4,1fr);
}
.ImgGrid{
  display: grid;
  grid-template-columns:  repeat(4,1fr);
  grid-template-rows: repeat(3,1fr);

}
.ImgGrid > *:nth-of-type(odd) {
    background: #e0e0e0;
}