body {
 margin: 0;
 display: flex;
 align-items: center;
 justify-content: center;
 height: 100vh;
 background-color: #212121;
}

.line {
  width: 300px;
  border-bottom: 4px solid white;
  position: relative;
  animation: animateline 2s linear infinite;
}

.hexagon {
  position: absolute;
  left: 0;
  bottom: 14px;
  width: 50px;
  height: 30px;
  background-color: white;
  animation: animatehexagon 2s linear infinite;
}

.hexagon:before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: white;
  transform: rotate(60deg);
}

.hexagon:after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: white;
  transform: rotate(-60deg);
}

@keyframes animatehexagon {
  0% { left: 0; }
  50% { left: calc(100% - 50px);
  transform: rotate(720deg) }
  100% { left: 0; }
}

@keyframes animateline {
  0% { transform: rotate(30deg); }
  25% { transform: rotate(0deg); }
  50% { transform: rotate(-30deg); }
  75% { transform: rotate(0deg); }
  100% { transform: rotate(30deg); }
}