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CSS

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HTML 

              
                <div class="card">
  <ul class="timeline">

    <li class="timeline__item">
      <div class="timeline__step">
        <div class="timeline__step__marker timeline__step__marker--red"></div>
      </div>
      <div class="timeline__time">
        5pm
      </div>
      <div class="timeline__content">
        <div class="timeline__title">
          New Icons
        </div>
        <ul class="timeline__points">
          <li>Mobile App</li>
        </ul>
      </div>
    </li>

    <li class="timeline__item">
      <div class="timeline__step">
        <div class="timeline__step__marker timeline__step__marker--blue"></div>
      </div>
      <div class="timeline__time">
        4pm
      </div>
      <div class="timeline__content">
        <div class="timeline__title">
          Design Stand Up
        </div>
        <ul class="timeline__points">
          <li>Hangouts</li>
        </ul>
      </div>
    </li>

    <li class="timeline__item">
      <div class="timeline__step">
        <div class="timeline__step__marker timeline__step__marker--salmon"></div>
      </div>
      <div class="timeline__time">
        9am
      </div>
      <div class="timeline__content">
        <div class="timeline__title">
          Break
        </div>
      </div>
    </li>

    <li class="timeline__item">
      <div class="timeline__step">
        <div class="timeline__step__marker timeline__step__marker--blue"></div>
      </div>
      <div class="timeline__time">
        2pm
      </div>
      <div class="timeline__content">
        <div class="timeline__title">
          Home Screen
        </div>
        <ul class="timeline__points">
          <li>Web App</li>
        </ul>
      </div>
    </li>

  </ul>
</div>
!

CSS 

              
                @import 'compass/css3'
@import '//fonts.googleapis.com/css?family=Muli:300'

$text: #1D1D26
$text-light: #77777D


$colors:  red #FF3467, blue #18D0BF, salmon #F48A6D, purple #C178FA

$timeline-padding-left-right: 62px
$timeline-tracker-padding-right: 11px

$timeline__item-padding-top-bottom: 62px

$timeline__step-padding-right: 62px

$timeline__step__marker-height: 24px
$timeline__step__marker-width: 24px
$timeline__step__marker-border-width: 4px

$timeline__time-padding-right: 126px
$timeline__time-font-size: 26px

$timeline__title-padding-bottom: 26px
$timeline__title-font-size: 32px

$timeline__points-padding-bottom: 12px
$timeline__points-font-size: 24px
  
  
/*
 * Timeline
 *

.timeline
  +display-flex()
  +flex-direction(column)
  padding: 0 $timeline-padding-left-right
  margin: 0
  list-style: none
  
  &::before
    position: fixed
    top: 0
    height: 100%
    padding-right: $timeline-tracker-padding-right
    border-right: 2px solid #F2F2F2
    content: ""

  &__item
    +display-flex()
    +align-items(stretch)
    padding: $timeline__item-padding-top-bottom 0
  
  &__step
    padding-right: $timeline__step-padding-right
    
    &__marker
      position: relative
      display: table-cell
      height: $timeline__step__marker-height
      min-height: $timeline__step__marker-height
      width: $timeline__step__marker-width
      min-width: $timeline__step__marker-width
      border: $timeline__step__marker-border-width solid #F2F2F2
      +border-radius(50%)
      background-color: white
      z-index: 0
      
      @each $color in $colors
        &--#{nth($color, 1)}
          border-color: nth($color, 2)
      
    
  &__time
    padding-right: $timeline__time-padding-right
    font-size: $timeline__time-font-size
    
  &__title
    padding-bottom: $timeline__title-padding-bottom
    font-size: $timeline__title-font-size
    
  &__points
    padding: 0
    list-style: none
    font-size: $timeline__points-font-size
    color: $text-light
    > *
      padding: 0 0 $timeline__points-padding-bottom 0
    
/*
 * For mobile!
 *

$ratio: 1.75
    
@media (max-width: 768px)
  .card
    max-width: 375
    
  .timeline
    padding: 0 ($timeline-padding-left-right / $ratio)

    &::before
      padding-right: $timeline-tracker-padding-right / $ratio

    &__item
      padding: ($timeline__item-padding-top-bottom / $ratio) 0

    &__step
      padding-right: $timeline__step-padding-right / $ratio

      &__marker
        height: $timeline__step__marker-height / $ratio
        min-hieght: $timeline__step__marker-height / $ratio
        width: $timeline__step__marker-width / $ratio
        min-width: $timeline__step__marker-width / $ratio
        border-width: $timeline__step__marker-border-width / $ratio

    &__time
      padding-right: $timeline__time-padding-right / $ratio
      font-size: $timeline__time-font-size / $ratio

    &__title
      padding-bottom: $timeline__title-padding-bottom / $ratio
      font-size: $timeline__title-font-size / $ratio

    &__points
      font-size: $timeline__points-font-size / $ratio
      > *
        padding-bottom: $timeline__points-padding-bottom / $ratio
      
      
/*
 * Display stuff
 *

html
  background: url(//s3-us-west-2.amazonaws.com/s.cdpn.io/153256/trees.jpg) no-repeat center center fixed
  +background-size(cover)
  
html, body
  line-height: 1.5rem
  font-family: 'Muli', sans-serif
  font-weight: 300
  margin: 0
  box-sizing: border-box
  height: 100%

*, *:before, *:after
  box-sizing: inherit
  
.card
  background-color: white
  max-width: 750px
  margin: 0 auto
  height: 100%
  +box-shadow(0 5px 5px -3px rgba(0,0,0,.2),0 8px 10px 1px rgba(0,0,0,.14),0 3px 14px 2px rgba(0,0,0,.12))
  display: table
!

JS
!
999px

Console