* {
    margin: 0;
    padding: 0;
  }
  
  html,
  body {
    height: 100vh;
    background-color:rgba(0, 0, 0, 1);
  }
  
  .red {
    background-color: red;
    height: 90%;
    margin-top: 5%;
  }
  
  .orange {
    background-color: orange;
    height: 80%;
    margin-top: 10%;
  }
  
  .yellow {
    background-color: yellow;
    height: 70%;
    margin-top: 15%;
  }
  
  .green {
    background-color: green;
    height: 60%;
    margin-top: 20%;
  }
  
  .teal {
    background-color: teal;
    height: 50%;
    margin-top: 25%;
  }
  
  .blue {
    background-color: darkblue;
    height: 40%;
    margin-top: 30%;
  }
  
  .purple {
    background-color: purple;
    height: 30%;
    margin-top: 35%;
  }
  
  #notes {
    display: flex;
    flex-direction: column;
    height: 100%;
    width: 50%;
    margin-left: 25%;
    column-gap: 10px;
  }
  
  #notes button {
    flex: 1;
    cursor: pointer;
    border: none;
    outline: none;
    font-size: 3rem;
    color: white;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
  }
  
  @media (min-width: 600px) {
    #notes {
      flex-direction: row;
    }
  }