.two-image--container{
  display: flex;
  flex-wrap: wrap;
  flex-direction: row;
}
.two-image--container .two-image--block{
  flex: 1 0 50%;
  max-width: 50%;
}
.two-image--container .two-image--block .block--image{width: 100%; height: 100%;}

@media only screen and (max-width: 768px){
  .two-image--container{flex-direction: column;}
  .two-image--container .two-image--block{flex: 1 0 100%; max-width: 100%;}
}