* {
  font-family: sans-serif;
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
body {
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background: #222;
}
.loader {
  position: relative;
  width: 400px;
  height: 4px;
  background: #000;
}

.loader::before {
  content: "";
  position: absolute;
  width: 100%;
  height: 100%;
  background: #0bec7c;
  transform-origin: left;
  animation: animate 8s linear infinite;
}

@keyframes animate {
  0%,
  20% {
    transform: scaleX(0);
  }
  40% {
    transform: scaleX(1);
    transform-origin: left;
  }
  40.0000001%,
  60% {
    transform: scaleX(1);
    transform-origin: right;
  }
  80%,
  100% {
    transform: scaleX(0);
    transform-origin: right;
  }
}

.loader::after {
  content: "";
  position: absolute;
  top: 50%;
  transform: translateY(-50%) scale(0);
  width: 10px;
  height: 10px;
  background: #0bec7c;
  border-radius: 50%;
  animation: animateDot 8s linear infinite;
}

@keyframes animateDot {
  0% {
    transform: translateY(-50%) scale(0);
  }
  5% {
    transform: translateY(-50%) scale(1);
  }
  15%,
  20% {
    transform: translateY(-50%) scale(1);
    box-shadow: 0 0 0 4px #0bec7c22, 0 0 20px #0bec7c, 0 0 40px 5px #0bec7c,
      0 0 60px 10px #0bec7c;
  }
  40% {
    transform: translateY(-50%) translateX(395px) scale(1);
  }
  80% {
    transform: translateY(-50%) translateX(395px) scale(1) ;
    box-shadow: 0 0 0 4px #0bec7c22, 0 0 20px #0bec7c, 0 0 40px 5px #0bec7c,
      0 0 60px 10px #0bec7c;
  }
  95%{
    transform: translateY(-50%) translateX(395px) scale(1) ;
    box-shadow: none;
  }
  100% {
    transform: translateY(-50%) translateX(395px) scale(0) ;
  }
}