<div class="text-center">
  <h1>Arrow @keyframes Animation</h1>
  <hr>
  <br/>
  Using checkbox as the basis of the arrow state.
</div>
<br/><br/><br/><br/>
<div class="text-center">
  <input type="checkbox" id="animation1">
  <label for="animation1">
    <div class="arrow"></div>
  </label>
  
  
  <input type="checkbox" id="animation2">
  <label for="animation2">
    <div class="arrow"></div>
  </label>
  
  
  <input type="checkbox" id="animation3">
  <label for="animation3">
    <div class="arrow"></div>
  </label>
</div>

.arrow {
  background: #fff;
  height: 3px;
  width: 30px;
  margin: 0 auto;
  position: relative;
  cursor: pointer;

  &:before,
  &:after {
    content: "";
    background: #fff;
    position: absolute;
    height: 3px;
    width: 15px;
  }

  &:before {
    right: -3px;
    bottom: -4px;
    transform: rotate(-45deg);
  }

  &:after {
    right: -3px;
    top: -4px;
    transform: rotate(45deg);
  }
}

// Animation 1
#animation1 {
  & + label > .arrow {
    &:before {
      animation: animation-1-before-reverse 1s ease 0s 1 alternate both;
    }

    &:after {
      animation: animation-1-after-reverse 1s ease 0s 1 alternate both;
    }
  }

  &:checked {
    & + label > .arrow {
      &:before {
        animation: animation-1-before 1s ease 0s 1 alternate both;
      }

      &:after {
        animation: animation-1-after 1s ease 0s 1 alternate both;
      }
    }
  }
}

@keyframes animation-1-after {
  0% {
    right: -3px;
    top: -4px;
    transform: rotate(45deg);
  }

  50% {
    width: 3px;
    border-radius: 50%;
    top: -20px;
    left: 15px;
  }

  100% {
    left: -3px;
    bottom: -4px;
    transform: rotate(135deg);
    height: 3px;
    width: 15px;
    background: #fff;
  }
}
@keyframes animation-1-before {
  0% {
    right: -3px;
    bottom: -4px;
    transform: rotate(-45deg);
  }

  50% {
    width: 3px;
    border-radius: 50%;
    bottom: -20px;
    left: 15px;
  }

  100% {
    left: -3px;
    bottom: -4px;
    transform: rotate(-135deg);
    height: 3px;
    width: 15px;
    background: #fff;
  }
}
@keyframes animation-1-after-reverse {
  0% {
    left: -3px;
    bottom: -4px;
    transform: rotate(135deg);
    height: 3px;
    width: 15px;
    background: #fff;
  }

  50% {
    width: 3px;
    border-radius: 50%;
    top: -20px;
    left: 15px;
  }

  100% {
    right: -3px;
    top: -4px;
    transform: rotate(45deg);
  }
}
@keyframes animation-1-before-reverse {
  0% {
    left: -3px;
    bottom: -4px;
    transform: rotate(-135deg);
    height: 3px;
    width: 15px;
    background: #fff;
  }

  50% {
    width: 3px;
    border-radius: 50%;
    bottom: -20px;
    left: 15px;
  }

  100% {
    right: -3px;
    bottom: -4px;
    transform: rotate(-45deg);
  }
}

// Animation 1
#animation2 {
  & + label > .arrow {
    &:before {
      animation: animation-2-before-reverse 1s ease 0s 1 alternate both;
    }

    &:after {
      animation: animation-2-after-reverse 1s ease 0s 1 alternate both;
    }
  }

  &:checked {
    & + label > .arrow {
      &:before {
        animation: animation-2-before 1s ease 0s 1 alternate both;
      }

      &:after {
        animation: animation-2-after 1s ease 0s 1 alternate both;
      }
    }
  }
}

@keyframes animation-2-after {
  0% {
    right: -3px;
    top: -4px;
    transform: rotate(45deg);
    background: blue;
  }

  50% {
    width: 3px;
    border-radius: 50%;
    top: 20px;
    left: 15px;
  }

  100% {
    left: -3px;
    bottom: -4px;
    transform: rotate(135deg);
    height: 3px;
    width: 15px;
    background: #fff;
  }
}
@keyframes animation-2-before {
  0% {
    right: -3px;
    bottom: -4px;
    transform: rotate(-45deg);
    background: red;
  }

  50% {
    width: 3px;
    border-radius: 50%;
    bottom: 20px;
    left: 15px;
  }

  100% {
    left: -3px;
    bottom: -4px;
    transform: rotate(-135deg);
    height: 3px;
    width: 15px;
    background: #fff;
  }
}
@keyframes animation-2-after-reverse {
  0% {
    left: -3px;
    bottom: -4px;
    transform: rotate(135deg);
    height: 3px;
    width: 15px;
    background: #fff;
  }

  50% {
    width: 3px;
    border-radius: 50%;
    top: 20px;
    left: 15px;
    background: red;
  }

  100% {
    right: -3px;
    top: -4px;
    transform: rotate(45deg);
    background: #fff;
  }
}
@keyframes animation-2-before-reverse {
  0% {
    left: -3px;
    bottom: -4px;
    transform: rotate(-135deg);
    height: 3px;
    width: 15px;
    background: #fff;
  }

  50% {
    width: 3px;
    border-radius: 50%;
    bottom: 20px;
    left: 15px;
    background: blue;
  }

  100% {
    right: -3px;
    bottom: -4px;
    transform: rotate(-45deg);
    background: #fff;
  }
}

#animation3 {
  & + label > .arrow {
    &:before {
      animation: animation-3-before-reverse 1s ease 0s 1 alternate both;
    }

    &:after {
      animation: animation-3-after-reverse 1s ease 0s 1 alternate both;
    }
  }

  &:checked {
    & + label > .arrow {
      &:before {
        animation: animation-3-before 1s ease 0s 1 alternate both;
      }

      &:after {
        animation: animation-3-after 1s ease 0s 1 alternate both;
      }
    }
  }
}

@keyframes animation-3-after {
  0% {
    right: -3px;
    top: -4px;
    transform: rotate(45deg);
    background: blue;
  }

  25% {
    width: 3px;
    border-radius: 50%;
    top: 20px;
    left: 15px;
  }

  75% {
    width: 3px;
    border-radius: 50%;
    top: -20px;
    left: 15px;
  }

  100% {
    left: -3px;
    bottom: -4px;
    transform: rotate(135deg);
    height: 3px;
    width: 15px;
    background: #fff;
  }
}
@keyframes animation-3-before {
  0% {
    right: -3px;
    top: -4px;
    transform: rotate(45deg);
    background: red;
  }

  25% {
    width: 3px;
    border-radius: 50%;
    top: -20px;
    left: 15px;
  }

  75% {
    width: 3px;
    border-radius: 50%;
    top: 20px;
    left: 15px;
  }

  100% {
    left: -3px;
    bottom: -4px;
    transform: rotate(-135deg);
    height: 3px;
    width: 15px;
    background: #fff;
  }
}
@keyframes animation-3-after-reverse {
  0% {
    left: -3px;
    bottom: -4px;
    transform: rotate(135deg);
    height: 3px;
    width: 15px;
    background: #fff;
  }

  50% {
    width: 3px;
    border-radius: 50%;
    top: -20px;
    left: 15px;
  }

  100% {
    right: -3px;
    top: -4px;
    transform: rotate(45deg);
  }
}
@keyframes animation-3-before-reverse {
  0% {
    left: -3px;
    bottom: -4px;
    transform: rotate(-135deg);
    height: 3px;
    width: 15px;
    background: #fff;
  }

  50% {
    width: 3px;
    border-radius: 50%;
    bottom: -20px;
    left: 15px;
  }

  100% {
    right: -3px;
    bottom: -4px;
    transform: rotate(-45deg);
  }
}

// General

body {
  background: #000;
  color: #fff;
}
.text-center {
  text-align: center;
}

hr {
  border: none;
  height: 1px;
  width: 20%;
  background: #fff;
}

input {
  display: none;
}

label {
  margin-bottom: 100px;
  display: block;
}