*{
  box-sizing: border-box;
  padding: 0;
  margin: 0;
  outline: none;
}

body{
  font-family: "Oswald";
   color: #000;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  overflow: hidden;
   background-repeat: no-repeat;
  background-attachment: fixed;
  background-size: 100% 100%;
}

.mainbox{
  position: relative;
  width: 500px;
  height: 500px;
}
.mainbox:after{
  position: absolute;
  content: '';
  width: 40px;
  height: 40px;
  background: url('arrow-left.png') no-repeat;
  background-size: 40px;
  right: -40px;
  top: 50%;
  transform: translateY(-50%);
}
.box{
  width: 100%;
  height: 100%;
  position: relative;
  font-weight: bold;
  border-radius: 50%;
  border: 0px solid #fff;
  overflow: hidden;
  transition: all ease 5s;
}

span{
  width: 100%;
  height: 100%;
  display: inline-block;
  position: absolute;
}
.span1{
  clip-path: circle(50.0% at 50% 50%);
  top: 0px;
  left: 0px;
}


.box1 .span1 b{
  transform: translate(-50%, -75%) rotate(185deg);
}






.spin{
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 75px;
  height: 75px;
  border-radius: 50%;
  border: 4px solid #fff;
  background-color: #000;
  color: #fff;
  box-shadow: 0 5px 20px #000;
  font-family:"Oswald";
  font-weight: bold;
  font-size: 18px;
  cursor: pointer;
}
.spin:active{
  width: 70px;
  height: 70px;
  font-size: 20px;
}

.mainbox.animate:after{
  animation: animateArrow 0.7s ease infinite;
}
@keyframes animateArrow{
  50%{
    right: -55px;
  }
}