For example, I have this code:
* {
margin: 0;
padding: 0;
box-sizing: border-box;
}
.block_1 {
display: inline-block;
width: 50%;
background: purple;
height: 100%;
}
.block_2 {
display: inline-block;
width: 50%;
background: pink;
height: 100%;
}
html, body {
height: 100%;
}
<div class="block_1"></div>
<div class="block_2"></div>