aside{
  position: fixed;
  right: 20px;
  top: calc(50% - 43px);
}
aside ul{

}
aside ul li {
  margin-bottom: 10px;
}
aside ul li:not(:last-child){
  margin-bottom: 10px;
}
aside ul li a {
   
  font-size: 0;
  width: 14px;
  height: 14px;
  display: block;
  background-color: #ccc;
  border-radius: 50%;
  transition: 0.5s;
}
.currentB{
  background-color: #009bfa; 
}
.currentW{
  background-color: white; 
}
.active a{
  background-color: blue;
  transform: scale(1);
}