body {
    background-image: url(track.png);
    background-repeat: no-repeat;
    background-size: cover; 
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    font-family: 'Patrick Hand', cursive;
}

.overlay {
    position: absolute;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(99, 41, 41, 0.235);
}
  .letters {
    font-size: 64px;
    display: flex;
    z-index: 1;
  }

  .balls {
    background-image: url(basketball.png);
    background-repeat: no-repeat;
    background-position: center;
    width: 108px;
    height: 404px;
    scale: 0.7;
    margin-top: -90px;
    animation: changeImage 10s infinite;
}

@keyframes changeImage {
    0%, 100% {
        background-image: url(basketball.png);
    }
    20% {
        background-image: url(football.png);
    }
    40% {
        background-image: url(tennisball.png);
    }
    60% {
        background-image: url(ball.png);
    }
    80% {
        background-image: url(baseball.png);
    }
}