<div class="lds-ripple"><div></div><div></div></div>
<div id="colorinfo"></div>

html,
body {
  height: 100vh;
  margin: 0;
  padding: 0;
  border: 0;
  color: #eee;
  background-color: #000;
  overflow: hidden;
}
body {
  display: flex;
  align-items: center;
  justify-content: center;
  align-content: center;
}

.lds-ripple {
  display: flex;
  position: relative;
  width: 300px;
  height: 300px;
  margin: auto;
}
.lds-ripple div {
  position: absolute;
  border: 4px solid #fff;
  opacity: 1;
  border-radius: 50%;
  animation: lds-ripple 1s cubic-bezier(0, 0.2, 0.8, 1) infinite;
}
.lds-ripple div:nth-child(2) {
  animation-delay: -0.5s;
}
@keyframes lds-ripple {
  0% {
    top: 150px;
    left: 150px;
    width: 0;
    height: 0;
    opacity: 1;
  }
  100% {
    top: 0px;
    left: 0px;
    width: 300px;
    height: 300px;
    opacity: 0;
  }
}

#colorinfo {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  margin: auto;
  text-align: center;
}

function RandomColor() {
  var randomColor = Math.floor(Math.random() * 16777215).toString(16);
  document.body.style.backgroundColor = "#" + randomColor + "65";
  document.getElementById("colorinfo").innerHTML = randomColor;
}
var interval = setInterval(RandomColor, 500);
setTimeout(function () {
  clearInterval(interval);
}, 60000);

//500 değişim sıklığı (yarım saniye)
//60000 toplam çalışacağı süre (1dakika)