.garland { position: fixed; top: 50%; transform: translateY(-50%); z-index: 1000;}#garland-left { left: 0;}#garland-right { right: 0;}.ball { width: 20px; height: 20px; background-color: red; border-radius: 50%; margin: 10px; animation: swing 2s ease-in-out infinite;}@keyframes swing { 0%, 100% { transform: rotate(-10deg); } 50% { transform: rotate(10deg); }}