body {
  width: 100vw;
  height: 100vh;
  position: fixed;
  background-color: #6f5981;
}

.content {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 2rem; 
  line-height: 20vh;
  font-family: 'Muli';
  color: #ecf0f1;
  height: 50vh;
  width:80vw;
  overflow: hidden;
}

.visible {
  font-weight: 600;
  overflow: hidden;
  height: 14vh;
  
}
.visible:before {
  content: '[';
  left: 0;
  line-height: 20vh;
}
.visible:after {
  content: ']';
  position: absolute;
  right: 0;
  line-height: 20vh;
}
.visible:after, .visible:before {
  position: absolute;
  top: 0;
  color: #16a085;
  font-size: 5rem;
  animation: 2s linear 0s normal none infinite opacity;
}


ul {
  margin-top: 0;
  text-align: left;
  list-style: none;
  animation: 6s linear 0s normal none change;
}

ul li {
  line-height: 20vh; 
  margin: 0;
}

@keyframes opacity {
  0%, 100% {
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
}
@keyframes change {
  0%, 12%, 100% {
    transform: translateY(0);
  }
  17%,29% {
    transform: translateY(-25%);
  }
  34%,46% {
    transform: translateY(-50%);
  }
  51%,63% {
    transform: translateY(-75%);
  }
  68%,80% {
    transform: translateY(-50%);
  }
  85%,97% {
    transform: translateY(-25%);
  }
}