<svg xmlns="http://www.w3.org/2000/svg" version="1.1" width="0" height="0">
  <defs>
    <filter id="goo">
      <feGaussianBlur in="SourceGraphic" stdDeviation="10" result="blur" />
      <feColorMatrix in="blur" mode="matrix" values="1 0 0 0 0  0 1 0 0 0  0 0 1 0 0  0 0 0 18 -7" result="goo" />
      <feBlend in="SourceGraphic" in2="goo" />
    </filter>
  </defs>
</svg>
<div class="demo">
  <div class="demo__buttons">
    <div class="demo__social-btn-4 demo__social-btn"><i class="fa fa-snapchat"></i></div>
    <div class="demo__social-btn-3 demo__social-btn"><i class="fa fa-instagram"></i></div>
    <div class="demo__social-btn-2 demo__social-btn"><i class="fa fa-facebook"></i></div>
    <div class="demo__social-btn-1 demo__social-btn"><i class="fa fa-twitter"></i></div>
    <div class="demo__open-btn"><i class="fa fa-share-alt"></i></div>
  </div>
  <span class="about-me">Check out my other <a target="_blank" href="https://codepen.io/kiyutink">pens</a> and follow me on <a target="_blank" href="https://twitter.com/kiyutin_k">twitter</a></span>
</div>

*, *:before, *:after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

svg {
  position: absolute;
}

.demo {
  width: 100vw;
  height: 100vh;  
  
  background: linear-gradient(45deg, darken(#CC9EC6, 30%), darken(#CC9EC6, 50%));
  
  &__buttons {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 200px;
    height: 200px;
    
    transform: translate(-100px, -100px);
    filter: url("#goo");
    
    &.step-0 {
      .demo__social-btn-1, .demo__social-btn-2, .demo__social-btn-3, .demo__social-btn-4 {
        transform: translate3d(-50px, -50px, 0);
      }
    }
    &.step-1 {
      .demo__social-btn-1 {
        transform: translate3d(-50px, -50px, 0);
      }
      .demo__social-btn-2, .demo__social-btn-3, .demo__social-btn-4 {
        transform: translate3d(-50px, 50px, 0);
      }
    }
    &.step-2 {      
      .demo__social-btn-1 {
        transform: translate3d(-50px, -50px, 0);
      }
      
      .demo__social-btn-2 {
        transform: translate3d(-50px, 50px, 0);
      }
      
      .demo__social-btn-3, .demo__social-btn-4 {
        transform: translate3d(50px, 50px, 0);
      }
    }
    &.step-3 {
      .demo__social-btn-1 {
        transform: translate3d(-50px, -50px, 0);
      }      
      .demo__social-btn-2 {
        transform: translate3d(-50px, 50px, 0);
      }
      
      .demo__social-btn-3 {
        transform: translate3d(50px, 50px, 0);
      }
      .demo__social-btn-4 {
        transform: translate3d(50px, -50px, 0);
      }
    }
  }
  
  &__social-btn {
    position: absolute;    
    left: 65px;
    top: 65px;
    
    width: 70px;
    height: 70px;
    
    text-align: center;
    line-height: 70px;
    font-size: 30px;
    
    background: white;
    color: #261758;
    
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.2s ease;
    
    &:hover {
      color: #106279;
      box-shadow: 0 0 15px white;
    }
  }
  
  &__open-btn {
    position: absolute;
    left: 65px;
    top: 65px;
    width: 70px;
    height: 70px;
    
    text-align: center;
    line-height: 70px;
    font-weight: 700;
    font-size: 30px;
    font-family: sans-serif;
    
    background: white;
    color: #261758;
    
    border-radius: 50%;
    cursor: pointer;
    
    transition: all 0.2s ease;
    
    &:hover {
      color: #106279;
      box-shadow: 0 0 15px white;
    }
  }
}

.about-me {
  position: absolute;
  bottom: 10px;
  width: 100%;
  text-align: center;
  font-size: 16px;
  color: white;  
  font-family: Roboto, Arial, sans-serif;
  
  a {
    color: white;
    
    &:hover {
      color: lighten(blue, 20%);
    }
  }
}

"use strict";

$(document).ready(function() {
  const $buttons = $(".demo__buttons");
  const $toggle = $(".demo__open-btn");
  let delay = 200;
  let steps = [];
  let open = false;
  
  let curStep = 0;

  for (let i = 0; i <= 3; i++) {
    steps[i] = "demo__step-" + i;
  }

  function setStep(index) {    
    $buttons.removeClass("step-1 step-0 step-3 step-2").addClass("step-" + curStep);   
  }
  
  let lastTimeout;

  function animate() {
    if (curStep >= 4) {
      curStep = 0;
      return;
    }

    open = true;
    setStep(curStep);    
    curStep++;
    lastTimeout = setTimeout(animate, delay);
  }

  $toggle.on("click", function() {
    if (!open) animate();
    else {
      $buttons.removeClass("step-1 step-0 step-3 step-2");
      clearTimeout(lastTimeout);
      open = false;
      curStep = 0;
    }
  });
});