CSS3如何实现div闪烁效果

 1 @keyframes fade {
 2             from {
 3                 opacity: 1.0;
 4             }
 5             50% {
 6                 opacity: 0.4;
 7             }
 8             to {
 9                 opacity: 1.0;
10             }
11         }
12         @-webkit-keyframes fade {
13             from {
14                 opacity: 1.0;
15             }
16             50% {
17                 opacity: 0.4;
18             }
19             to {
20                 opacity: 1.0;
21             }
22         }
23         .blink {
24             color: red;
25             padding: 10px;
26             font-size: 15px;
27             height: 60px;
28             animation: fade 600ms infinite;
29             -webkit-animation: fade 600ms infinite;
30         }