#03-Push-Button.htm

<div a></div>
<div b></div>
<div c></div>
<div d></div>
<style>
    body {
        background: #6592CF;
    }

    div {
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
    }

    [a] {
        width: 300px;
        height: 150px;
        background: #243D83;
    }

    [b] {
        width: 250px;
        height: 250px;
        border-radius: 50%;
        background: #6592CF;
    }

    [c] {
        width: 150px;
        height: 150px;
        border-radius: 50%;
        background: #243D83;
    }

    [d] {
        width: 50px;
        height: 50px;
        border-radius: 50%;
        background: #EEB850;
    }
</style>