.timeline ul li {
  list-style-type: none;
  position: relative;
  width: 3px;
  margin: 0 auto;
  padding-top: 50px;
  background: #fff;
}
 
 
.timeline ul li::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: inherit;
}

.timeline ul li div {
  position: relative;
  bottom: 0;
  width: 400px;
  padding: 15px;
  background: #e191c4;
}
 
.timeline ul li div::before {
  content: '';
  position: absolute;
  bottom: 7px;
  width: 0;
  height: 0;
  border-style: solid;
}

.timeline ul li:nth-child(odd) div {
  left: 45px;
}
 
.timeline ul li:nth-child(odd) div::before {
  left: -15px;
  border-width: 8px 16px 8px 0;
  border-color: transparent #e191c4 transparent transparent;
}

.timeline ul li:nth-child(even) div {
  left: -439px;
}
 
.timeline ul li:nth-child(even) div::before {
  right: -15px;
  border-width: 8px 0 8px 16px;
  border-color: transparent transparent transparent #e191c4;
}



/*

.timeline ul li::after {
  background: #fff;
  transition: background .5s ease-in-out;
}
 
.timeline ul li.in-view::after {
  background: #F45B69;
}
 
.timeline ul li div {
  visibility: hidden;
  opacity: 0;
  transition: all .5s ease-in-out;
}
 
.timeline ul li:nth-child(odd) div {
  transform: translate3d(200px,0,0);
}
 
.timeline ul li:nth-child(even) div {
  transform: translate3d(-200px,0,0);
}
 
.timeline ul li.in-view div {
  transform: none;
  visibility: visible;
  opacity: 1;
}
*/