.flex-container {
display: flex;
flex-wrap: wrap;
}
.flex-container > div {
background-repeat: no-repeat;
background-position: center center;
background-size: cover;
width: 33.33%;
height: 200px;
}
.flex-container > div:nth-child(3n+1) {
margin-left: 0;
}
.flex-container > div:nth-child(1) {
background-image: url("images/puzzle3/1.png");
}
.flex-container > div:nth-child(2) {
background-image: url("images/puzzle3/2.png");
}
.flex-container > div:nth-child(3) {
background-image: url("images/puzzle3/faulty.png");
display: none;
}
.flex-container > div:nth-child(4) {
background-image: url("images/puzzle3/4.png");
}
.flex-container > div:nth-child(5) {
background-image: url("images/puzzle3/5.png");
}
.flex-container > div:nth-child(6) {
background-image: url("images/puzzle3/6.png");
}