テンプレート:テスト2/style.css
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.grainbow {
animation: grainbow .5s linear infinite normal;
}
@keyframes grainbow {
0% {background: linear-gradient(90deg, red, orange, yellow, green, blue, purple)}
20% {background: linear-gradient(90deg, orange, yellow, green, blue, purple, red)}
40% {background: linear-gradient(90deg, yellow, green, blue, purple, red, orange)}
60% {background: linear-gradient(90deg, green, blue, purple, red, orange, yellow)}
80% {background: linear-gradient(90deg, blue, purple, red, orange, yellow, green)}
100% {background: linear-gradient(90deg, purple, red, orange, yellow, green, blue)}
}