@keyframes breathe{0%,to{transform:scale(1);opacity:.7}50%{transform:scale(1.5);opacity:1}}.loader{display:flex;justify-content:center;align-items:center;height:200px;position:relative}.circle{width:40px;height:40px;border-radius:50%;position:absolute;animation:breathe 2s ease-in-out infinite;background-color:#3498db}.circle:nth-child(2){animation-delay:.5s;background-color:rgba(52,152,219,.5)}.circle:nth-child(3){animation-delay:1s;background-color:rgba(52,152,219,.3)}