body {     background-color: rgb(117, 157, 0); 
}
.center { 
    height: 100%;
    position: relative;
    text-align: center; 
    margin-top: 50px;
    padding: 70px 0;
}

.sk-fading-circle {
  margin: 100px auto;
  width: 40px;
  height: 40px;
  position: relative;
}

.sk-fading-circle .sk-circle {
  width: 100%;
  height: 100%;
  position: absolute;
  left: 0;
  top: 0;
}