css3 实现页面灯光闪烁效果

实现效果：

HTML：

<div class="lamp-container"></div>

css: 

.lamp-container {position: absolute;top: 50%;left: 50%;width: 200px;height: 200px;-webkit-animation-timing-function: ease-in-out;-webkit-animation-name: breathe;-webkit-animation-duration: 1000ms;-webkit-animation-iteration-count: infinite;-webkit-animation-direction: alternate;
}@-webkit-keyframes breathe {0% {opacity: 0.2;background: radial-gradient(56% 56% at 51% 47%, rgba(33, 2, 2, 0) 0%, rgba(255, 4, 4, 0.31) 100%);}100% {opacity: 1;background: radial-gradient(56% 56% at 51% 47%, rgba(33, 2, 2, 0) 0%, rgba(255, 4, 4, 0.31) 100%);}
}

参考文章：css3实现科技感的呼吸灯效果_css3呼吸灯-CSDN博客