首先，如果我说答案是 1 个HTML标签即可,并且并不用:befroe和:after。你信吗？
不管你信不信，代码就在这里：
//css
.din4 {
display : inline-block;
color : #fff;
width : 20px;
height : 20px;
position : relative;
background : radial-gradient(circle at 22% 22%, rgba(255, 68, 68, 0.8) 20%, transparent 0%),
radial-gradient(circle at 78% 22%, rgba(255, 187, 50, 0.85) 20%, transparent 0%),
radial-gradient(circle at 22% 78%, rgba(153, 204, 0, 0.8) 20%, transparent 0%),
radial-gradient(circle at 78% 78%, rgba(51, 181, 229, 0.8) 20%, transparent 0%) no-repeat;
animation : load4din 1s linear infinite;
margin : 30px
animation : load4din2 1s linear infinite;
}
@keyframes load4din {
0% {
background : radial-gradient(circle at 22% 22%, rgba(255, 68, 68, 0.8) 20%, transparent 0%),
radial-gradient(circle at 78% 22%, rgba(255, 187, 50, 0.85) 20%, transparent 0%),
radial-gradient(circle at 22% 78%, rgba(153, 204, 0, 0.8) 20%, transparent 0%),
radial-gradient(circle at 78% 78%, rgba(51, 181, 229, 0.8) 20%, transparent 0%);
transform : rotate(0deg);
}
5% {
background : radial-gradient(circle at 25% 25%, rgba(255, 68, 68, 0.8) 20%, transparent 0%),
radial-gradient(circle at 75% 25%, rgba(255, 187, 50, 0.85) 20%, transparent 0%),
radial-gradient(circle at 25% 75%, rgba(153, 204, 0, 0.8) 20%, transparent 0%),
radial-gradient(circle at 75% 75%, rgba(51, 181, 229, 0.8) 20%, transparent 0%);
}
10% {
background : radial-gradient(circle at 28% 28%, rgba(255, 68, 68, 0.8) 20%, transparent 0%),
radial-gradient(circle at 72% 28%, rgba(255, 187, 50, 0.85) 20%, transparent 0%),
radial-gradient(circle at 28% 72%, rgba(153, 204, 0, 0.8) 20%, transparent 0%),
radial-gradient(circle at 72% 72%, rgba(51, 181, 229, 0.8) 20%, transparent 0%);
}
15% {
background : radial-gradient(circle at 31% 31%, rgba(255, 68, 68, 0.8) 20%, transparent 0%),
radial-gradient(circle at 69% 31%, rgba(255, 187, 50, 0.85) 20%, transparent 0%),
radial-gradient(circle at 31% 69%, rgba(153, 204, 0, 0.8) 20%, transparent 0%),
radial-gradient(circle at 69% 69%, rgba(51, 181, 229, 0.8) 20%, transparent 0%);
}
20% {
background : radial-gradient(circle at 34% 34%, rgba(255, 68, 68, 0.8) 20%, transparent 0%),
radial-gradient(circle at 66% 34%, rgba(255, 187, 50, 0.85) 20%, transparent 0%),
radial-gradient(circle at 34% 66%, rgba(153, 204, 0, 0.8) 20%, transparent 0%),
radial-gradient(circle at 66% 66%, rgba(51, 181, 229, 0.8) 20%, transparent 0%);
}
25% {
background : radial-gradient(circle at 37% 37%, rgba(255, 68, 68, 0.8) 20%, transparent 0%),
radial-gradient(circle at 63% 37%, rgba(255, 187, 50, 0.85) 20%, transparent 0%),
radial-gradient(circle at 37% 63%, rgba(153, 204, 0, 0.8) 20%, transparent 0%),
radial-gradient(circle at 63% 63%, rgba(51, 181, 229, 0.8) 20%, transparent 0%);
}
30% {
background : radial-gradient(circle at 39% 39%, rgba(255, 68, 68, 0.8) 20%, transparent 0%),
radial-gradient(circle at 61% 39%, rgba(255, 187, 50, 0.85) 20%, transparent 0%),
radial-gradient(circle at 39% 61%, rgba(153, 204, 0, 0.8) 20%, transparent 0%),
radial-gradient(circle at 61% 61%, rgba(51, 181, 229, 0.8) 20%, transparent 0%);
}
35% {
background : radial-gradient(circle at 42% 42%, rgba(255, 68, 68, 0.8) 20%, transparent 0%),
radial-gradient(circle at 58% 42%, rgba(255, 187, 50, 0.85) 20%, transparent 0%),
radial-gradient(circle at 42% 58%, rgba(153, 204, 0, 0.8) 20%, transparent 0%),
radial-gradient(circle at 58% 58%, rgba(51, 181, 229, 0.8) 20%, transparent 0%);
}
40% {
background : radial-gradient(circle at 45% 45%, rgba(255, 68, 68, 0.8) 20%, transparent 0%),
radial-gradient(circle at 55% 45%, rgba(255, 187, 50, 0.85) 20%, transparent 0%),
radial-gradient(circle at 45% 55%, rgba(153, 204, 0, 0.8) 20%, transparent 0%),
radial-gradient(circle at 55% 55%, rgba(51, 181, 229, 0.8) 20%, transparent 0%);
}
45% {
background : radial-gradient(circle at 47% 47%, rgba(255, 68, 68, 0.8) 20%, transparent 0%),
radial-gradient(circle at 53% 47%, rgba(255, 187, 50, 0.85) 20%, transparent 0%),
radial-gradient(circle at 47% 53%, rgba(153, 204, 0, 0.8) 20%, transparent 0%),
radial-gradient(circle at 53% 53%, rgba(51, 181, 229, 0.8) 20%, transparent 0%);
}
50% {
background : radial-gradient(circle at 50% 50%, rgba(255, 68, 68, 0.8) 20%, transparent 0%),
radial-gradient(circle at 50% 50%, rgba(255, 187, 50, 0.85) 20%, transparent 0%),
radial-gradient(circle at 50% 50%, rgba(153, 204, 0, 0.8) 20%, transparent 0%),
radial-gradient(circle at 50% 50%, rgba(51, 181, 229, 0.8) 20%, transparent 0%);
}
55% {
background : radial-gradient(circle at 47% 47%, rgba(255, 68, 68, 0.8) 20%, transparent 0%),
radial-gradient(circle at 53% 47%, rgba(255, 187, 50, 0.85) 20%, transparent 0%),
radial-gradient(circle at 47% 53%, rgba(153, 204, 0, 0.8) 20%, transparent 0%),
radial-gradient(circle at 53% 53%, rgba(51, 181, 229, 0.8) 20%, transparent 0%);
}
60% {
background : radial-gradient(circle at 45% 45%, rgba(255, 68, 68, 0.8) 20%, transparent 0%),
radial-gradient(circle at 55% 45%, rgba(255, 187, 50, 0.85) 20%, transparent 0%),
radial-gradient(circle at 45% 55%, rgba(153, 204, 0, 0.8) 20%, transparent 0%),
radial-gradient(circle at 55% 55%, rgba(51, 181, 229, 0.8) 20%, transparent 0%);
}
65% {
background : radial-gradient(circle at 42% 42%, rgba(255, 68, 68, 0.8) 20%, transparent 0%),
radial-gradient(circle at 58% 42%, rgba(255, 187, 50, 0.85) 20%, transparent 0%),
radial-gradient(circle at 42% 58%, rgba(153, 204, 0, 0.8) 20%, transparent 0%),
radial-gradient(circle at 58% 58%, rgba(51, 181, 229, 0.8) 20%, transparent 0%);
}
70% {
background : radial-gradient(circle at 39% 39%, rgba(255, 68, 68, 0.8) 20%, transparent 0%),
radial-gradient(circle at 61% 39%, rgba(255, 187, 50, 0.85) 20%, transparent 0%),
radial-gradient(circle at 39% 61%, rgba(153, 204, 0, 0.8) 20%, transparent 0%),
radial-gradient(circle at 61% 61%, rgba(51, 181, 229, 0.8) 20%, transparent 0%);
}
75% {
background : radial-gradient(circle at 37% 37%, rgba(255, 68, 68, 0.8) 20%, transparent 0%),
radial-gradient(circle at 63% 37%, rgba(255, 187, 50, 0.85) 20%, transparent 0%),
radial-gradient(circle at 37% 63%, rgba(153, 204, 0, 0.8) 20%, transparent 0%),
radial-gradient(circle at 63% 63%, rgba(51, 181, 229, 0.8) 20%, transparent 0%);
}
80% {
background : radial-gradient(circle at 34% 34%, rgba(255, 68, 68, 0.8) 20%, transparent 0%),
radial-gradient(circle at 66% 34%, rgba(255, 187, 50, 0.85) 20%, transparent 0%),
radial-gradient(circle at 34% 66%, rgba(153, 204, 0, 0.8) 20%, transparent 0%),
radial-gradient(circle at 66% 66%, rgba(51, 181, 229, 0.8) 20%, transparent 0%);
}
85% {
background : radial-gradient(circle at 31% 31%, rgba(255, 68, 68, 0.8) 20%, transparent 0%),
radial-gradient(circle at 69% 31%, rgba(255, 187, 50, 0.85) 20%, transparent 0%),
radial-gradient(circle at 31% 69%, rgba(153, 204, 0, 0.8) 20%, transparent 0%),
radial-gradient(circle at 69% 69%, rgba(51, 181, 229, 0.8) 20%, transparent 0%);
}
90% {
background : radial-gradient(circle at 28% 28%, rgba(255, 68, 68, 0.8) 20%, transparent 0%),
radial-gradient(circle at 72% 28%, rgba(255, 187, 50, 0.85) 20%, transparent 0%),
radial-gradient(circle at 28% 72%, rgba(153, 204, 0, 0.8) 20%, transparent 0%),
radial-gradient(circle at 72% 72%, rgba(51, 181, 229, 0.8) 20%, transparent 0%);
}
95% {
background : radial-gradient(circle at 25% 25%, rgba(255, 68, 68, 0.8) 20%, transparent 0%),
radial-gradient(circle at 75% 25%, rgba(255, 187, 50, 0.85) 20%, transparent 0%),
radial-gradient(circle at 25% 75%, rgba(153, 204, 0, 0.8) 20%, transparent 0%),
radial-gradient(circle at 75% 75%, rgba(51, 181, 229, 0.8) 20%, transparent 0%);
}
100% {
background : radial-gradient(circle at 22% 22%, rgba(255, 68, 68, 0.8) 20%, transparent 0%),
radial-gradient(circle at 78% 22%, rgba(255, 187, 50, 0.85) 20%, transparent 0%),
radial-gradient(circle at 22% 78%, rgba(153, 204, 0, 0.8) 20%, transparent 0%),
radial-gradient(circle at 78% 78%, rgba(51, 181, 229, 0.8) 20%, transparent 0%);
transform : rotate(360deg);
}
}
//html