.animated-background{animation:modal-popup-animation 1s infinite ease-in-out;height:600px;width:100%;margin:5px 0;border-radius:3px}@keyframes modal-popup-animation{0%{background-color:#a5a5a51a}50%{background-color:#a5a5a5b3}to{background-color:#a5a5a51a}}