body{
  margin: 0;
  padding: 0;
  background-color:  #2c3e50;
  box-sizing: border-box;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family:  'tahoma',sans-serif;
}

.loading{
  width: 200px;
  height: 200px;
  border-radius: 50%;
  /* background: red;  test kon*/
  border-top: 10px solid #e74c3c;
  position: relative;/* havaset bashe akhar bezar*/
  animation: a1 2s linear infinite;/* havaset bashe akhar bezar*/
}

.loading:before,.loading:after{
  content: '';
  width: 200px;
  height: 200px;
  /* background: red;  test kon*/
  position: absolute;
  left: 0;
  top: -10px;
  border-radius: 50%;
}
.loading:before{
  border-top:10px solid #e67e22;
  transform: rotate(120deg);
}
.loading:after{
  border-top: 10px solid #3498db;
  transform: rotate(240deg);
}
.loading span{
  position: absolute;
  width: 200px;
  height: 200px;
  color: #fff;
  text-align: center;
  line-height: 200px;
  animation: a2 2s linear infinite;/* havaset bashe akhar bezar*/

}
@keyframes a1 {
  to{
    transform: rotate(360deg);
  }

}
@keyframes a2 {
  to{
    transform: rotate(-360deg);
  }

}