.box {
  width: 50px;
  height: 50px;
  position: relative;
  margin-bottom: 2px;
}

.red {
  background-color: red;
}

.blue {
  background-color: blue;
}

/* #controls {
  position: absolute;
  top: 10%;
  left: 50%;
  width: 310px;
  transform: translate(-50%, 120px);
} */

button {
  margin-top: 20px;
}

.sel-rate {
  background: #33333;
}

.loader {
  border: 16px solid #f3f3f3; /* Light grey */
  border-top: 16px solid #7c64f7; /* Blue */
  border-radius: 50%;
  width: 120px;
  height: 120px;
  animation: spin 2s linear infinite;
  margin-top: 20px;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}