Timeline.VerticalBothSides.css

.timeline-section {
    padding: 3em 0;
}

.timeline-container {
    max-width: 800px;
    margin: 0 auto;
}

.timeline-entry {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
}

/* icon */
.timeline-entry-icon {
    width: calc(50% - 30px);
    display: flex;
    justify-content: center;
    align-items: flex-start;
    order: 1;
}

.timeline-entry-icon-wrapper {
    color: #aaa;
    font-size: 53px;
    border: 8px solid #aaa;
    text-align: center;
    height: 120px;
    width: 120px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
    position: relative;
    margin-top: 12px;
}

.timeline-entry-icon-wrapper:after {
    content: '';
    position: absolute;
    right: -30px;
    top: calc(50% - 20px);
    background: none;
    width: 0;
    height: 0;
    border-right: none;
    border-bottom: 20px solid transparent;
    border-top: 20px solid transparent;
    border-left: 30px solid #aaa;
}

/* image */
.timeline-entry-icon-wrapper picture {
    overflow: hidden;
    border-radius: 50%;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.timeline-entry-icon-wrapper picture img.fill-image {
    object-fit: cover;
    width: 100%;
    height: 100%;

}

/* line - middle */
.timeline-entry-line {
    width: 60px;
    min-width: 60px;
    max-width: 60px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 200px;
    order: 2;
}

.timeline-entry-line-caption {
    margin-bottom: 30px;
    position: relative;
}

.timeline-entry-line-caption:after {
    content: '';
    position: absolute;
    bottom: -23px;
    left: calc(50% - 7px);
    width: 12px;
    height: 12px;
    background: none;
    border-radius: 16px;
    border: 2px solid #999;
}

.timeline-entry-line-caption-number {
    display: block;
    font-size: 200%;
}

.timeline-entry-line-dots {
    height: 100%;
    width: 0;
    border-right: 6px dotted #999;
    position: relative;
}


/* text content */
.timeline-entry-desc {
    padding-left: 40px;
    width: calc(50% - 30px);
    font-size: 90%;
    order: 3;
    margin-bottom: 40px;
}

.timeline-entry-desc header {
    padding-bottom: 0;
}

.timeline-entry-desc header h2 {
    font-size: 28px;
}

.timeline-entry-desc header p {
    font-size: 16px;
}


/* nth child */
/*************/

.timeline-entry:nth-child(2n+2) .timeline-entry-desc {
    order: 1;
    padding-left: 0;
    padding-right: 40px;
}

.timeline-entry:nth-child(2n+2) .timeline-entry-icon {
    order: 3;
}

.timeline-entry:nth-child(2n+2) .timeline-entry-icon-wrapper:after {
    right: auto;
    left: -30px;
    border-right: 30px solid #aaa;
    border-left: none;
}

/* last entry - transparent dots */
.timeline-entry:last-child .timeline-entry-line-dots:after {
    height: 80px;
    position: absolute;
    bottom: 0;
    left: 0;
    width: 10px;
    background: linear-gradient(0deg, #fff, transparent);
    content: '';
}


/* FARBEN */
/* 1 */
.timeline-entry:nth-child(5n+1) .timeline-entry-icon-wrapper,
.timeline-entry:nth-child(5n+1) .timeline-entry-line-caption:after {
    border-color: lightcoral;
}
.timeline-entry:nth-child(5n+1) .timeline-entry-icon-wrapper:after {
    border-left-color: lightcoral;
    border-right-color: lightcoral;
}

/* 2 */
.timeline-entry:nth-child(5n+2) .timeline-entry-icon-wrapper,
.timeline-entry:nth-child(5n+2) .timeline-entry-line-caption:after {
    border-color: lightblue;
}
.timeline-entry:nth-child(5n+2) .timeline-entry-icon-wrapper:after {
    border-left-color: lightblue;
    border-right-color: lightblue;
}

/* 3 */
.timeline-entry:nth-child(5n+3) .timeline-entry-icon-wrapper,
.timeline-entry:nth-child(5n+3) .timeline-entry-line-caption:after {
    border-color: lightsalmon;
}
.timeline-entry:nth-child(5n+3) .timeline-entry-icon-wrapper:after {
    border-left-color: lightsalmon;
    border-right-color: lightsalmon;
}

/* 4 */
.timeline-entry:nth-child(5n+4) .timeline-entry-icon-wrapper,
.timeline-entry:nth-child(5n+4) .timeline-entry-line-caption:after {
    border-color: lightseagreen;
}
.timeline-entry:nth-child(5n+4) .timeline-entry-icon-wrapper:after {
    border-left-color: lightseagreen;
    border-right-color: lightseagreen;
}

/* 5 */
.timeline-entry:nth-child(5n+5) .timeline-entry-icon-wrapper,
.timeline-entry:nth-child(5n+5) .timeline-entry-line-caption:after {
    border-color: yellowgreen;
}
.timeline-entry:nth-child(5n+5) .timeline-entry-icon-wrapper:after {
    border-left-color: yellowgreen;
    border-right-color: yellowgreen;
}

/***************/
/* media query */
/***************/

@media screen and (max-width: 767px) {
    .timeline-entry:nth-child(2n+2) .timeline-entry-desc {
        order: 3;
        padding-left: 20px;
        padding-right: 0;
    }

    .timeline-entry-desc {
        width: calc(100% - 60px);
        padding-left: 20px;
    }

    .timeline-entry:nth-child(2n+2) .timeline-entry-icon {
        order: 1;
    }

    .timeline-entry-icon {
        display: none;
    }
}