body {
    margin: 0;
    padding: 0;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #2c2f69;
}

.firework {
    position: absolute;
}

.explosion {
    position: absolute;
    left: -2px;
    bottom: 0;
    width: 4px;
    height: 80px;
    transform-origin: 50% 100%;
    /* background-color: rgba(0,0,0,.2); */
    overflow: hidden;
}

    .explosion:nth-child(1) {
        transform: rotate(0deg) translateY(-15px);
    }

    .explosion:nth-child(2) {
        transform: rotate(30deg) translateY(-15px);
    }

    .explosion:nth-child(3) {
        transform: rotate(60deg) translateY(-15px);
    }

    .explosion:nth-child(4) {
        transform: rotate(90deg) translateY(-15px);
    }

    .explosion:nth-child(5) {
        transform: rotate(120deg) translateY(-15px);
    }

    .explosion:nth-child(6) {
        transform: rotate(150deg) translateY(-15px);
    }

    .explosion:nth-child(7) {
        transform: rotate(180deg) translateY(-15px);
    }

    .explosion:nth-child(8) {
        transform: rotate(210deg) translateY(-15px);
    }

    .explosion:nth-child(9) {
        transform: rotate(240deg) translateY(-15px);
    }

    .explosion:nth-child(10) {
        transform: rotate(270deg) translateY(-15px);
    }

    .explosion:nth-child(11) {
        transform: rotate(300deg) translateY(-15px);
    }

    .explosion:nth-child(12) {
        transform: rotate(330deg) translateY(-15px);
    }

    .explosion::before {
        content: '';
        position: absolute;
        left: 0;
        right: 0;
        top: 100%;
        height: 40px;
        background-color: #f5cf52;
    }

@keyframes explosion {
    0% {
        top: 100%;
    }

    33%, 100% {
        top: -50%;
    }
}

#firework1 {
    left: 50%;
    top: 50%;
    transform: scale(1);
}

    #firework1 .explosion::before {
        animation: explosion 2s ease-in-out infinite;
    }

#firework2 {
    left: 40%;
    top: 45%;
    transform: scale(.7);
}

    #firework2 .explosion::before {
        animation: explosion 2s .6s ease-in-out infinite;
    }

#firework3 {
    left: 60%;
    top: 65%;
    transform: scale(.4);
}

    #firework3 .explosion::before {
        animation: explosion 2s .4s ease-in-out infinite;
    }

#firework4 {
    left: 90%;
    top: 15%;
    transform: scale(.9);
}

    #firework4 .explosion::before {
        animation: explosion 2s .7s ease-in-out infinite;
    }

#firework5 {
    left: 5%;
    top: 85%;
    transform: scale(.7);
}

    #firework5 .explosion::before {
        animation: explosion 3s .4s ease-in-out infinite;
    }

.youtube-link {
    position: fixed;
    left: 20px;
    bottom: 20px;
    color: #fff;
    text-decoration: none;
    font-size: 12px;
}