.Index {
  width: 100vw;
  height: 100vh;
  background: #ccc;
  position: relative;
}
.Index .text {
  width: 200px;
  height: 200px;
  text-align: center;
  z-index: 9;
  font-size: 30px;
  line-height: 200px;
  color: white;
  position: absolute;
  left: 50%;
  top: 10%;
  transform: translate(-50%, 0%);
}
.contrast .button {
  width: 150px;
  height: 50px;
  background: #00ff6f;
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translate(-50%, 0);
  border-radius: 100px 100px 0 0;
  filter: blur(5px);
}
.contrast {
  width: 100%;
  height: 100%;
  background-color: #000;
  overflow: hidden;
  filter: contrast(15) hue-rotate(0);
  position: relative;
  animation: hueRotate 6s linear infinite;
}
.contrast span {
  background: #00ff6f;
  position: absolute;
  bottom: 0;
  border-radius: 100px 100px 0 0;
  filter: blur(5px);
  animation: moveUp ease-in-out infinite;
}
.contrast span:nth-child(1) {
  width: 20px;
  height: 20px;
  left: 50%;
  animation-duration: 4s;
  animation-delay: 2s;
}
.contrast span:nth-child(2) {
  width: 22px;
  height: 22px;
  left: 54%;
  animation-duration: 4.2s;
  animation-delay: 4s;
}
.contrast span:nth-child(3) {
  width: 24px;
  height: 24px;
  left: 45%;
  animation-duration: 3s;
  animation-delay: 1s;
}

.contrast span:nth-child(4) {
  width: 20px;
  height: 22px;
  left: 54%;
  animation-duration: 5s;
  animation-delay: 0s;
}
.contrast span:nth-child(5) {
  width: 22px;
  height: 22px;
  left: 52%;
  animation-duration: 3.5s;
  animation-delay: 5s;
}
.contrast span:nth-child(6) {
  width: 20px;
  height: 20px;
  left: 50%;
  animation-duration: 4.7s;
  animation-delay: 1.2s;
}

.contrast span:nth-child(7) {
  width: 22px;
  height: 22px;
  left: 54%;
  animation-duration: 2.5s;
  animation-delay: 3.5s;
}

.contrast span:nth-child(8) {
  width: 24px;
  height: 24px;
  left: 51%;
  animation-duration: 5.6s;
  animation-delay: 4.2s;
}
.contrast span:nth-child(9) {
  width: 26px;
  height: 26px;
  left: 42%;
  animation-duration: 5.2s;
  animation-delay: 4s;
}
.contrast span:nth-child(10) {
  width: 26px;
  height: 22px;
  left: 54%;
  animation-duration: 3.8s;
  animation-delay: 4.3s;
}
.contrast span:nth-child(11) {
  width: 22px;
  height: 22px;
  left: 42%;
  animation-duration: 4.2s;
  animation-delay: 0.3s;
}

.contrast span:nth-child(12) {
  width: 24px;
  height: 24px;
  left: 46%;
  animation-duration: 4.6s;
  animation-delay: 2s;
}

.contrast span:nth-child(13) {
  width: 22px;
  height: 22px;
  left: 48%;
  animation-duration: 3.8s;
  animation-delay: 3.2s;
}
.contrast span:nth-child(14) {
  width: 26px;
  height: 22px;
  left: 55%;
  animation-duration: 5.2s;
  animation-delay: 2.9s;
}
.contrast span:nth-child(15) {
  width: 26px;
  height: 22px;
  left: 52%;
  animation-duration: 4.9s;
  animation-delay: 4.2s;
}
.circle {
  width: 300px;
  height: 300px;
  position: absolute;
  top: 10px;
  left: 50%;
  margin-left: -150px;
  box-sizing: border-box;
  filter: blur(8px);
  animation: circleRotate 6s linear infinite;
}
.circle::before {
  content: "";
  height: 200px;
  width: 200px;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) rotate(0);
  background: #00ff6f;
  border-radius: 42% 38% 62% 49% / 45%;
}
.circle::after {
  content: "";
  width: 176px;
  height: 178px;
  background: #000;
  border-radius: 50%;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}
@keyframes hueRotate {
  0% {
    filter: contrast(15) hue-rotate(0);
  }

  100% {
    filter: contrast(15) hue-rotate(360deg);
  }
}

@keyframes circleRotate {
  0% {
    transform: rotate(0deg);
  }

  100% {
    transform: rotate(360deg);
  }
}

@keyframes moveUp {
  0% {
    bottom: 0;
  }

  100% {
    bottom: calc(100% - 265px);
  }
}