<div class="element"></div>

.element {
  height: 400px;
  width: 400px;
  background-color: red;
  animation: 
    pulse 3s ease infinite alternate, 
    nudge 5s linear infinite alternate;
  border-radius: 100%;
}

@keyframes pulse {
  0%, 100% {
    background-color: red;
  }
  50% {
    background-color: orange;
  }
}

@keyframes nudge {
  0%, 100% {
    transform: translate(0, 0);
  }
  
  50% {
    transform: translate(150px, 0);
  }
  
  80% {
    transform: translate(-150px, 0);
  }
}


html, body {
  height: 100%;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
}