<!DOCTYPE html>
<html>
<head>
    <style>
        .flexContainer {
            background: purple;
            display: flex;
            width: 70px;
            height: 70px;
        }

        .item {
            background: teal;
            flex: 0.4;
        }
    </style>
</head>
<body>
<div class="flexContainer">
    <div class="item"></div>
</div>
</body>
</html>
