task.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <link rel="stylesheet" href="css/style.css">
    <title>Displays</title>
</head>
<body>
    <div class="mainDiv">
        <div class="firstDiv">
            <div class="red"></div>
            <div class="redCir"></div>
            <div class="red"></div>
        </div>
        <div class="secondDiv">
            <div class="yellowCir"></div>
            <div class="yellow"></div>
            <div class="yellow"></div>
        </div>
        <div class="thirdDiv">
            <div class="green"></div>
            <div class="green"></div>
            <div class="greenCir"></div>
        </div>
    </div>
</body>
</html>