Japan flag tutorial

This is what goes on HTML:

    <div>
        <div class="japanContainer">
            <div class="japanDot">
        </div>
    </div>
    

This is what goes on CSS:

    .japanContainer {
        width: 225px;
        height: 150px;
        background-color: white;
        justify-content: center;
        align-items: center;
        display: flex;
      }
      
      .japanDot {
        width: 40px;
        height: 40px;
        border-radius: 20px;
        background-color: red;
      }