轮播图

轮播图html代码
 <div class="container">
        <div class="box">
            <img src="img/1.jpg" alt="" >
            <img src="img/2.jpg" alt="" >
            <img src="img/3.jpg" alt="" >
            <img src="img/4.jpg" alt="" >
            <img src="img/1.jpg" alt="" >
        </div>
        <div class="wrapper">
            <div class="circle"></div>
            <div class="circle"></div>
            <div class="circle"></div>
            <div class="circle"></div>
        </div>
    </div>

轮播图css代码
* {
  margin: 0;
  padding: 0;
}

.container {
  width: 100%;
  height: 450px;
  position: relative;
  overflow: hidden;
}

.container .box {
  width: 500%;
  height: 450px;
  background-color: #ccc;
  display: flex;
  margin-left: 0px;
  animation: move 20s linear infinite;
}

.container .box img {
  width: 20%;
  height: 450px;
}

.container .wrapper {
  position: absolute;
  bottom: 30px;
  left: 0;
  width: 100%;
  display: flex;
  justify-content: center;
}

.container .wrapper .circle {
  width: 10px;
  height: 10px;
  border: 1px solid red;
  margin: 0 10px;
  border-radius: 50%;
  animation: circleshow 20s linear infinite;
}

.container .wrapper .circle:nth-child(2) {
  animation: circleshow 20s linear 5s infinite;
}

.container .wrapper .circle:nth-child(3) {
  animation: circleshow 20s linear 10s infinite;
}

.container .wrapper .circle:nth-child(4) {
  animation: circleshow 20s linear 15s infinite;
}

@keyframes move {
  0% {
    margin-left: 0%;
  }
  20% {
    margin-left: 0%;
  }
  25% {
    margin-left: -100%;
  }
  45% {
    margin-left: -100%;
  }
  50% {
    margin-left: -200%;
  }
  70% {
    margin-left: -200%;
  }
  75% {
    margin-left: -300%;
  }
  95% {
    margin-left: -300%;
  }
  100% {
    margin-left: -400%;
  }
}

@keyframes circleshow {
  0% {
    background-color: white;
  }
  20% {
    background-color: white;
  }
  25% {
    background-color: transparent;
  }
  100% {
    background-color: transparent;
  }
}