<div id='container'>
  <div class='triangle'></div>
  <div class='triangle'></div>
  <div class='triangle'></div>
  <div class='triangle'></div>
  <div class='triangle'></div>
</div>

<div id="linkBack" style="position:absolute;right:0px;top:0px;background-color:#333;margin:0;width:60px;"><a href="http://www.f-rilling.com/projects/" target="_blank" style="font-size:14px;text-decoration:none;color:#fff;padding:0 0 0 5px;font-family:sans-serif">My Site</a></div>

$color_1:#90cdf2;
$color_2:#d390f2;
$color_3:#ea9071;
$color_4:#f2c390;
$color_5:#f5e983;

body {
  background-color: #444;
}

#container {
  width: 600px;
  margin: 360px auto 0 auto;
}
triangleCon{
  height:600px;
}
.triangle {
  width: 0px;
  height: 0px;
  opacity: 0.75;
  margin: auto;
  position:relative;
  animation: enlarge_1 2s infinite;
}

.triangle:nth-child(2) {
  animation: enlarge_2 2s infinite;
  animation-delay: 0.2s;
}

.triangle:nth-child(3) {
  animation: enlarge_3 2s infinite;
  animation-delay: 0.4s;
}
.triangle:nth-child(4) {
  animation: enlarge_4 2s infinite;
  animation-delay: 0.6s;
}.triangle:nth-child(5) {
  animation: enlarge_5 2s infinite;
  animation-delay: 0.8s;
}
@keyframes enlarge_1 {
  from {
    opcatiy: 1;
    border-left: 2px solid transparent;
    border-right: 2px solid transparent;
    border-bottom: 4px solid $color_1;
    margin-top: 0px;
  }
  to {
    opacity: 0;
    border-left: 200px solid transparent;
    border-right: 200px solid transparent;
    border-bottom: 300px solid $color_1;
    margin-top: -300px;
  }
}

@keyframes enlarge_2 {
  from {
    opcatiy: 1;
    border-left: 2px solid transparent;
    border-right: 2px solid transparent;
    border-bottom: 4px solid $color_2;
    margin-top: -4px;
  }
  to {
    opacity: 0;
    border-left: 200px solid transparent;
    border-right: 200px solid transparent;
    border-bottom: 300px solid $color_2;
    margin-top: -300px;
  }
}

@keyframes enlarge_3 {
  from {
    opcatiy: 1;
    border-left: 2px solid transparent;
    border-right: 2px solid transparent;
    border-bottom: 4px solid $color_3;
    margin-top: -4px;
  }
  to {
    opacity: 0;
    border-left: 200px solid transparent;
    border-right: 200px solid transparent;
    border-bottom: 300px solid $color_3;
    margin-top: -300px;
  }
}
@keyframes enlarge_4 {
  from {
    opcatiy: 1;
    border-left: 2px solid transparent;
    border-right: 2px solid transparent;
    border-bottom: 4px solid $color_4;
    margin-top: -4px;
  }
  to {
    opacity: 0;
    border-left: 200px solid transparent;
    border-right: 200px solid transparent;
    border-bottom: 300px solid $color_4;
    margin-top: -300px;
  }
}
@keyframes enlarge_5 {
  from {
    opcatiy: 1;
    border-left: 2px solid transparent;
    border-right: 2px solid transparent;
    border-bottom: 4px solid $color_5;
    margin-top: -4px;
  }
  to {
    opacity: 0;
    border-left: 200px solid transparent;
    border-right: 200px solid transparent;
    border-bottom: 300px solid $color_5;
    margin-top: -300px;
  }
}

//Check out more cool stuff on my site: https://rilling.dev/