ight: calc(10px / 3);
        margin-top: calc(10px / 3);
        background: #ff1d5e;
        float: left;
        position: relative;
        opacity: 0;
        animation: self-building-square-spinner 6s infinite;
      }

      .self-building-square-spinner .square:nth-child(1) {
        animation-delay: calc(300ms * 6);
      }

      .self-building-square-spinner .square:nth-child(2) {
        animation-delay: calc(300ms * 7);
      }

      .self-building-square-spinner .square:nth-child(3) {
       