<!DOCTYPE html>
<html lang="en">

<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>进化吧</title>
<script src="https://cdnjs.cloudflare.com/ajax/libs/gsap/3.9.1/gsap.min.js"></script>
<style>
body {
background: #44baa8
}

.text {
position: absolute;
left: 50%;
top: 50%;
color: yellow;
font-size: 300px;
filter: url(#gooey)
}

.text::before, .text::after {
position: absolute;
opacity: 0;
transform: translate(-50%, -50%);
animation-duration: 39s;
animation-timing-function: ease;
animation-iteration-count: infinite;
filter: blur(9px)
}

.text::before {
content: "Y";
animation-name: items-odd
}

.text::after {
content: "Z";
animation-name: items-even;
animation-delay: 1.5s
}

@keyframes items-odd {
2.5641025641% {
opacity: 1
}
3.8461538462% {
opacity: 1
}
6.4102564103% {
opacity: 0
}
7.6923076923% {
opacity: 0
}
10.2564102564% {
opacity: 1
}
11.5384615385% {
opacity: 1
}
14.1025641026% {
opacity: 0
}
15.3846153846% {
opacity: 0
}
17.9487179487% {
opacity: 1
}
19.2307692308% {
opacity: 1
}
21.7948717949% {
opacity: 0
}
23.0769230769% {
opacity: 0
}
25.641025641% {
opacity: 1
}
26.9230769231% {
opacity: 1
}
29.4871794872% {
opacity: 0
}
30.7692307692% {
opacity: 0
}
33.3333333333% {
opacity: 1
}
34.6153846154% {
opacity: 1
}
37.1794871795% {
opacity: 0
}
38.4615384615% {
opacity: 0
}
41.0256410256% {
opacity: 1
}
42.3076923077% {
opacity: 1
}
44.8717948718% {
opacity: 0
}
46.1538461538% {
opacity: 0
}
48.7179487179% {
opacity: 1
}
50% {
opacity: 1
}
52.5641025641% {
opacity: 0
}
53.8461538462% {
opacity: 0
}
56.4102564103% {
opacity: 1
}
57.6923076923% {
opacity: 1
}
60.2564102564% {
opacity: 0
}
61.5384615385% {
opacity: 0
}
64.1025641026% {
opacity: 1
}
65.3846153846% {
opacity: 1
}
67.9487179487% {
opacity: 0
}
69.2307692308% {
opacity: 0
}
71.7948717949% {
opacity: 1
}
73.0769230769% {
opacity: 1
}
75.641025641% {
opacity: 0
}
76.9230769231% {
opacity: 0
}
79.4871794872% {
opacity: 1
}
80.7692307692% {
opacity: 1
}
83.3333333333% {
opacity: 0
}
84.6153846154% {
opacity: 0
}
87.1794871795% {
opacity: 1
}
88.4615384615% {
opacity: 1
}
91.0256410256% {
opacity: 0
}
92.3076923077% {
opacity: 0
}
94.8717948718% {
opacity: 1
}
96.1538461538% {
opacity: 1
}
98.7179487179% {
opacity: 0
}
100% {
opacity: 0
}
0% {
content: "A"
}
7.6922076923% {
content: "A"
}
7.6923076923% {
content: "C"
}
15.3845153846% {
content: "C"
}
15.3846153846% {
content: "E"
}
23.0768230769% {
content: "E"
}
23.0769230769% {
content: "G"
}
30.7691307692% {
content: "G"
}
30.7692307692% {
content: "I"
}
38.4614384615% {
content: "I"
}
38.4615384615% {
content: "K"
}
46.1537461538% {
content: "K"
}
46.1538461538% {
content: "M"
}
53.8460538462% {
content: "M"
}
53.8461538462% {
content: "O"
}
61.5383615385% {
content: "O"
}
61.5384615385% {
content: "Q"
}
69.2306692308% {
content: "Q"
}
69.2307692308% {
content: "S"
}
76.9229769231% {
content: "S"
}
76.9230769231% {
content: "U"
}
84.6152846154% {
content: "U"
}
84.6153846154% {
content: "W"
}
92.3075923077% {
content: "W"
}
92.3076923077% {
content: "Y"
}
99.9999% {
content: "Y"
}
}

@keyframes items-even {
2.5641025641% {
opacity: 1
}
3.8461538462% {
opacity: 1
}
6.4102564103% {
opacity: 0
}
7.6923076923% {
opacity: 0
}
10.2564102564% {
opacity: 1
}
11.5384615385% {
opacity: 1
}
14.1025641026% {
opacity: 0
}
15.3846153846% {
opacity: 0
}
17.9487179487% {
opacity: 1
}
19.2307692308% {
opacity: 1
}
21.7948717949% {
opacity: 0
}
23.0769230769% {
opacity: 0
}
25.641025641% {
opacity: 1
}
26.9230769231% {
opacity: 1
}
29.4871794872% {
opacity: 0
}
30.7692307692% {
opacity: 0
}
33.3333333333% {
opacity: 1
}
34.6153846154% {
opacity: 1
}
37.1794871795% {
opacity: 0
}
38.4615384615% {
opacity: 0
}
41.0256410256% {
opacity: 1
}
42.3076923077% {
opacity: 1
}
44.8717948718% {
opacity: 0
}
46.1538461538% {
opacity: 0
}
48.7179487179% {
opacity: 1
}
50% {
opacity: 1
}
52.5641025641% {
opacity: 0
}
53.8461538462% {
opacity: 0
}
56.4102564103% {
opacity: 1
}
57.6923076923% {
opacity: 1
}
60.2564102564% {
opacity: 0
}
61.5384615385% {
opacity: 0
}
64.1025641026% {
opacity: 1
}
65.3846153846% {
opacity: 1
}
67.9487179487% {
opacity: 0
}
69.2307692308% {
opacity: 0
}
71.7948717949% {
opacity: 1
}
73.0769230769% {
opacity: 1
}
75.641025641% {
opacity: 0
}
76.9230769231% {
opacity: 0
}
79.4871794872% {
opacity: 1
}
80.7692307692% {
opacity: 1
}
83.3333333333% {
opacity: 0
}
84.6153846154% {
opacity: 0
}
87.1794871795% {
opacity: 1
}
88.4615384615% {
opacity: 1
}
91.0256410256% {
opacity: 0
}
92.3076923077% {
opacity: 0
}
94.8717948718% {
opacity: 1
}
96.1538461538% {
opacity: 1
}
98.7179487179% {
opacity: 0
}
100% {
opacity: 0
}
0% {
content: "B"
}
7.6922076923% {
content: "B"
}
7.6923076923% {
content: "D"
}
15.3845153846% {
content: "D"
}
15.3846153846% {
content: "F"
}
23.0768230769% {
content: "F"
}
23.0769230769% {
content: "H"
}
30.7691307692% {
content: "H"
}
30.7692307692% {
content: "J"
}
38.4614384615% {
content: "J"
}
38.4615384615% {
content: "L"
}
46.1537461538% {
content: "L"
}
46.1538461538% {
content: "N"
}
53.8460538462% {
content: "N"
}
53.8461538462% {
content: "P"
}
61.5383615385% {
content: "P"
}
61.5384615385% {
content: "R"
}
69.2306692308% {
content: "R"
}
69.2307692308% {
content: "T"
}
76.9229769231% {
content: "T"
}
76.9230769231% {
content: "V"
}
84.6152846154% {
content: "V"
}
84.6153846154% {
content: "X"
}
92.3075923077% {
content: "X"
}
92.3076923077% {
content: "Z"
}
99.9999% {
content: "Z"
}
}
</style>
</head>

<body>
<div class="text"></div>
<svg>
<filter id="gooey">
<feGaussianBlur in="SourceGraphic" stdDeviation="9" result="blur"></feGaussianBlur>
<feColorMatrix in="blur" mode="matrix" values="1 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 28 -8" result="gooey">
</feColorMatrix>
<feComposite in="SourceGraphic" in2="gooey" operator="atop"></feComposite>
</filter>
</svg>
</body>

</html>