Вы знаете хороший Java Генератор RSS/канала? [закрытый]

.loader-container {
  position: absolute;
  width: 100%;
  height: 100%;
  left: 0px;
  top: 0px;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  background-color: aquamarine;
}

.loader {
  border: 2px solid red;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  width: 200px;
  height: 100px;
  position: relative;
}

.loader::after,
.loader::before {
  content: "";
  display: block;
  border-radius: 50%;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.loader::before {
  border: 2px solid blue;
  width: 50px;
  height: 50px;
}

.loader::after {
  border: 2px solid green;
  width: 100px;
  height: 100px;
}

<div class="loader-container">
  <div class='loader'></div>
</div>