/* HTML: <div class="loader"></div> */
.loader {
  width: 120px;
  height: 20px;
  border-radius: 20px;
  background:
   repeating-linear-gradient(135deg,#f03355 0 10px,#ffa516 0 20px) 0/0%   no-repeat,
   repeating-linear-gradient(135deg,#ddd    0 10px,#eee    0 20px) 0/100%;
  animation: l3 2s infinite;
}
@keyframes l3 {
    100% {background-size:100%}
}