index.css

* {
  margin:0;
  padding:0;
}
a{
  text-decoration: none;
}
.container {
  position: relative;
  width: 600px;
  height: 400px;
  margin:100px auto 0 auto;
  box-shadow: 0 0 5px green;
  overflow: hidden;
}
.container .wrap {
  position: absolute;
  width: 4200px;
  height: 400px;
  z-index: 1;
}
.container .wrap img {
  float: left;
  width: 600px;
  height: 400px;
}
.container .buttons {
  position: absolute;
  right: 5px;
  bottom:40px;
  width: 150px;
  height: 10px;
  z-index: 2;
}
.container .buttons span {
  margin-left: 5px;
  display: inline-block;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background-color: green;
  text-align: center;
  color:white;
  cursor: pointer;
}
.container .buttons span.on{
  background-color: red;
}
.container .arrow {
  position: absolute;
  top: 35%;
  color: green;
  padding:0px 14px;
  border-radius: 50%;
  font-size: 50px;
  z-index: 2;
  display: none;
}
.container .arrow_left {
  left: 10px;
}
.container .arrow_right {
  right: 10px;
}
.container:hover .arrow {
  display: block;
}
.container .arrow:hover {
  background-color: rgba(0,0,0,0.2);
}