<ul>
  <li>
    <a href="#">Wavy Wavy Wavy</a>
  </li>
  <li>
    <a href="#">Zig Zag Zig Zag</a>
  </li>
  <li>
    <a href="#">Let's Goooo!</a>
  </li>
</ul>

body {
  height: 100vh;
  width: 100vw;
  overflow: hidden;
  display: grid;
  justify-content: center;
  align-content: center;
  background: #fff;
  ul {
    list-style-type: none;
    background: #1155cb;
    padding:30px 80px 40px 90px;
    border-radius:5px;
    box-shadow:0 40px 30px -20px rgba(0,0,0,0.25);
    li {
      text-align:left;
      position:relative;
      &:hover{
        &:after{
          box-shadow:0 0 0 5px #1155cb, 0 0 0 7px #e0ff00;
        }
      }
      &:after{
        content:'';
        position:absolute;
        width:7.5px;
        height:7.5px;
        background:#c2ff00;
        border-radius:100%;
        left:-25px;
        top:50%;
        transform:translate(0,-50%);
        box-shadow:0 0 0 0 #1155cb, 0 0 0 0 #e0ff00;
        transition:0.4s ease-in-out;
      }
      &:nth-of-type(2) {
        a {
          &:before{
            bottom:-50px;
            transform-origin:left;
          }
          &:hover {
            &:before {
              background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200%25' height='100%25'%3E%3Cdefs%3E%3Cstyle%3E .wave%7B animation:wave 2s cubic-bezier(0.175, 0.885, 0.32, 1) infinite; animation-delay:-0.25s; stroke:%23e0ff00; stroke-width:2; stroke-linecap:square; %7D @keyframes wave%7B 25%25%7B d:path('M 0 20 L 10 15 L 20 20 L 30 25 L 40 20 ');%0A%7D%0A50%25%7B%0Ad:path('M 0 20 L 10 25 L 20 20 L 30 15 L 40 20  ');%0A%7D%0A75%25%7B%0Ad:path('M 0 20 L 10 15 L 20 20 L 30 25 L 40 20 ');%0A%7D %7D %3C/style%3E%3C/defs%3E%3Cpattern id='wavePattern' x='0' y='0' width='40' height='40' patternUnits='userSpaceOnUse'%3E%3Cpath fill='none' class='wave' d='M 0 20 L 10 25 L 20 20 L 30 15 L 40 20' /%3E%3C/pattern%3E%3Crect x='0' y='0' width='100%25' height='100%25' fill='url(%23wavePattern)'%3E%3C/rect%3E%3C/svg%3E")
                0px 50% / 40px 40px repeat-x;
              animation: waving 6s linear infinite reverse;
              transform-origin:right;
            }
          }
        }
      }
      &:nth-of-type(3) {
        a {
          &:before{
            transform-origin:right;
            width:calc(100% + 25px);
          }
          &:hover {
            &:before {
              background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200%25' height='100%25'%3E%3Cdefs%3E%3Cstyle%3E .wave%7B animation:wave 2s linear infinite; animation-delay:0s; stroke:%23e0ff00; stroke-width:2; stroke-dashoffset:0px; stroke-dasharray:80px; stroke-linecap:round; fill:%231155cb; %7D @keyframes wave%7B 25%25%7B stroke-dashoffset:-80px; %7D 50%25%7B stroke-dashoffset:-80px; %7D 100%25%7B stroke-dashoffset:-160px; %7D %7D %3C/style%3E%3C/defs%3E%3Cpattern id='wavePattern' x='0' y='0' width='80' height='80' patternUnits='userSpaceOnUse'%3E%3Cpath class='wave' d='M 0 40 L 50 40 L 80 40 L 54 44 L 54 36 L 80 40 ' /%3E%3C/pattern%3E%3Crect x='0' y='0' width='100%25' height='100%25' fill='url(%23wavePattern)'%3E%3C/rect%3E%3C/svg%3E")
                calc(100% - 10px) 50% / 40px 80px no-repeat, url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200%25' height='100%25'%3E%3Cdefs%3E%3Cstyle%3E .wave%7B stroke:%23e0ff00; stroke-width:2; stroke-linecap:round; %7D %3C/style%3E%3C/defs%3E%3Cpattern id='wavePattern' x='0' y='0' width='80' height='80' patternUnits='userSpaceOnUse'%3E%3Cpath fill='none' class='wave' d='M 0 40 Q 20 40 40 40 Q 60 40 80 40' /%3E%3C/pattern%3E%3Crect x='0' y='0' width='100%25' height='100%25' fill='url(%23wavePattern)'%3E%3C/rect%3E%3C/svg%3E")
        0px 50% / calc(100% - 25px) 80px no-repeat;
              animation:none;
              transform-origin:left;
            }
          }
        }
      }
    }
  }
  a {
    display: inline-block;
    margin:20px 0;
    position: relative;
    color: #fff;
    font-family: "Futura";
    text-decoration: none;
    font-size: 22px;
    z-index: 2;
    transition:0.2s ease-in-out;
    &:hover {
      color:#c2ff00;
      &:before {
        transition: transform 300ms cubic-bezier(0.175, 0.885, 0.32, 1.275);
        transform-origin:left;
        background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200%25' height='100%25'%3E%3Cdefs%3E%3Cstyle%3E .wave%7B animation:wave 1s ease-in-out infinite alternate; animation-delay:-0.25s; stroke:%23e0ff00; stroke-width:2; stroke-linecap:square; %7D @keyframes wave%7B to%7B d:path('M 0 40 Q 20 42.5 40 40 Q 60 37.5 80 40'); %7D %7D %3C/style%3E%3C/defs%3E%3Cpattern id='wavePattern' x='0' y='0' width='80' height='80' patternUnits='userSpaceOnUse'%3E%3Cpath fill='none' class='wave' d='M 0 40 Q 20 37.5 40 40 Q 60 42.5 80 40' /%3E%3C/pattern%3E%3Crect x='0' y='0' width='100%25' height='100%25' fill='url(%23wavePattern)'%3E%3C/rect%3E%3C/svg%3E")
          0px 50% / 80px 80px repeat-x;
        animation: waving 3s linear infinite;
        transform: scaleX(1);
        @keyframes waving {
          to {
            background-position: 80px 50%, 160px 50%;
          }
        }
      }
    }
    &:before {
      content: "";
      position: absolute;
      width: 100%;
      height: 80px;
      left: 0;
      bottom: -45px;
      z-index: -1;
      transform: scaleX(0);
      transition: transform 300ms cubic-bezier(0.175, 0.885, 0.32, 1);
      transform-origin: right;
      background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200%25' height='100%25'%3E%3Cdefs%3E%3Cstyle%3E .wave%7B stroke:%23e0ff00; stroke-width:2; stroke-linecap:square; %7D %3C/style%3E%3C/defs%3E%3Cpattern id='wavePattern' x='0' y='0' width='80' height='80' patternUnits='userSpaceOnUse'%3E%3Cpath fill='none' class='wave' d='M 0 40 Q 20 40 40 40 Q 60 40 80 40' /%3E%3C/pattern%3E%3Crect x='0' y='0' width='100%25' height='100%25' fill='url(%23wavePattern)'%3E%3C/rect%3E%3C/svg%3E")
        0px 50% / 80px 80px repeat-x;
    }
  }
}