timeline.css

* {
            box-sizing: border-box;
}

body {

    filter: progid: DXImageTransform.Microsoft.gradient( startColorstr="#FF1B6B", endColorstr="#45CAFF", GradientType=1 );
    font-family: Helvetica, sans-serif;
    margin: 0;
}



/* The actual timeline (the vertical ruler) */
.timeline {
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
}

@import url('https://fonts.googleapis.com/css?family=Merriweather');
.timeline li {
        font-family: 'Merriweather';font-size: 20px;

}

/* The actual timeline (the vertical ruler) */
.timeline::after {
    content: '';
    position: absolute;
    width: 6px;
    background-color: white;
    top: 0;
    bottom: 0;
    left: 50%;
    margin-left: -3px;
}

/* Container around content */
.container-timeline {
    padding: 10px 40px;
    position: relative;
    background-color: inherit;
    width: 50%;
}

/* The circles on the timeline */
.container-timeline::after {
    content: '';
    position: absolute;
    width: 25px;
    height: 25px;
    right: -17px;
    background-color: #333;
    border: 4px solid #ff0000;
    top: 15px;
    border-radius: 50%;
    z-index: 1;
}

/* Place the container to the left */
.left {
    left: 0;
}

/* Place the container to the right */
.right {
    left: 50%;
}

/* Add arrows to the left container (pointing right) */
.left::before {
    content: " ";
    height: 0;
    position: absolute;
    top: 22px;
    width: 0;
    z-index: 1;
    right: 30px;
    border: medium solid white;
    border-width: 10px 0 10px 10px;
    border-color: transparent transparent transparent white;
}

/* Add arrows to the right container (pointing left) */
.right::before {
    content: " ";
    height: 0;
    position: absolute;
    top: 22px;
    width: 0;
    z-index: 1;
    left: 30px;
    border: medium solid white;
    border-width: 10px 10px 10px 0;
    border-color: transparent white transparent transparent;
}

/* Fix the circle for containers on the right side */
.right::after {
    left: -16px;
}

/* The actual content */
.content {
    padding: 20px 30px;
    background-color: white;
    position: relative;
    border-radius: 6px;
    box-shadow: 0 19px 38px rgba(0,0,0,0.30), 0 15px 12px rgba(0,0,0,0.22);
}

.content:hover {
    box-shadow: 19px 38px 38px 19px rgba(0,0,0,0.30), 0 15px 12px rgba(0,0,0,0.22);
}


/* Media queries - Responsive timeline on screens less than 600px wide */
@media screen and (max-width: 600px) {

    /* Place the timelime to the left */
    .timeline::after {
        left: 31px;
    }

    /* Full-width containers */
    .container-timeline {
        width: 100%;
        padding-left: 70px;
        padding-right: 25px;
    }

    /* Make sure that all arrows are pointing leftwards */
    .container-timeline::before {
        left: 60px;
        border: medium solid white;
        border-width: 10px 10px 10px 0;
        border-color: transparent white transparent transparent;
    }

    /* Make sure all circles are at the same spot */
    .left::after,
    .right::after {
        left: 15px;
    }

    /* Make all right containers behave like the left ones */
    .right {
        left: 0%;
    }

    .timeline li {
        font-family: 'Merriweather';font-size: 20px;

}
}

.confetti-container {
    width: 100%;
    height: 100%;
}
.confetti {
    width: 15px;
    height: 15px;
    background-color: #f2d74e;
    position: absolute;
    left: 50%;
    animation: confetti 5s ease-in-out -2s infinite;
    transform-origin: left top;
}
.confetti:nth-child(1) {
    background-color: #f2d74e; left: 10%; animation-delay: 0;
}
.confetti:nth-child(2) {
    background-color: #95c3de; left: 20%; animation-delay: -5s;
}
.confetti:nth-child(3) {
    background-color: #ff9a91; left: 30%; animation-delay: -3s;
}
.confetti:nth-child(4) {
    background-color: #f2d74e; left: 40%; animation-delay: -2.5s;
}
.confetti:nth-child(5) {
    background-color: #95c3de; left: 50%; animation-delay: -4s;
}
.confetti:nth-child(6) {
    background-color: #ff9a91; left: 60%; animation-delay: -6s;
}
.confetti:nth-child(7) {
    background-color: #f2d74e; left: 70%; animation-delay: -1.5s;
}
.confetti:nth-child(8) {
    background-color: #95c3de; left: 80%; animation-delay: -2s;
}
.confetti:nth-child(9) {
    background-color: #ff9a91; left: 90%; animation-delay: -3.5s;
}
.confetti:nth-child(10) {
    background-color: #f2d74e; left: 100%; animation-delay: -2.5s;
}

@keyframes confetti {
    0% { transform: rotateZ(15deg) rotateY(0deg) translate(0,0); }
    25% { transform: rotateZ(5deg) rotateY(360deg) translate(-5vw,20vh); }
    50% { transform: rotateZ(15deg) rotateY(720deg) translate(5vw,60vh); }
    75% { transform: rotateZ(5deg) rotateY(1080deg) translate(-10vw,80vh); }
    100% { transform: rotateZ(15deg) rotateY(1440deg) translate(10vw,110vh); }
}