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ertyuio

<style> * { box-sizing: border-box; }

body {
margin: 0;
font-family: Arial;
}

.header {
text-align: center;
padding: 32px;
}

.row {
display: -ms-flexbox; /* IE10 /
display: flex;
-ms-flex-wrap: wrap; / IE10 */
flex-wrap: wrap;
padding: 0 4px;
}

/* Create four equal columns that sit next to each other /
.column {
-ms-flex: 25%; / IE10 */
flex: 25%;
max-width: 25%;
padding: 0 4px;
}

.column img {
margin-top: 8px;
vertical-align: middle;
width: 100%;
}

/* Responsive layout - makes a two column-layout instead of four columns */
@media screen and (max-width: 800px) {
.column {
-ms-flex: 50%;
flex: 50%;
max-width: 50%;
}
}

/* Responsive layout - makes the two columns stack on top of each other instead of next to each other */
@media screen and (max-width: 600px) {
.column {
-ms-flex: 100%;
flex: 100%;
max-width: 100%;
}
}
</style>

Responsive Image Grid

Resize the browser window to see the responsive effect.