gistfile1.txt

moveTextForward() {
    if (mounted) {
      textAnimationController.forward(from: 0).whenComplete(() {
        textScaleAnimationController.forward(from: 0).whenComplete(() {
          textScaleAnimationController.reverse().whenComplete(() {
            Future.delayed(const Duration(milliseconds: 2000), () {
              if (!isProcessingText) {
                originalStr = MDLanguage().w('please wait');
              } else {
                originalStr = MDLanguage().w('processing');
              }
              isProcessingText = !isProcessingText;
              if (!widget.isLoading) {
                return;
              }

              moveTextForward();
            });
          });
        });
      });
    }
  }

  Widget textFirstWidget() {
    String part1 = originalStr.substring(0, currentCharacter);
    String part2 = originalStr.substring(currentCharacter, maxCharacter + 1);
    String part11 =
        originalStr.substring(0, min(currentCharacter + 2, maxCharacter));
    String part22 = originalStr.substring(
        min(currentCharacter + 2, maxCharacter), maxCharacter + 1);
    String part111 =
        originalStr.substring(0, min(currentCharacter + 4, maxCharacter));
    String part222 = originalStr.substring(
        min(currentCharacter + 4, maxCharacter), maxCharacter + 1);

    return Stack(
      children: [
        RichText(
          maxLines: 10,
          textAlign: TextAlign.center,
          overflow: TextOverflow.ellipsis,
          text: TextSpan(
            text: part111,
            children: <TextSpan>[
              TextSpan(text: part222, style: testWhiteTextStyle()),
            ],
            style: testRedTextStyle(),
          ),
        ),
        RichText(
          maxLines: 10,
          textAlign: TextAlign.center,
          overflow: TextOverflow.ellipsis,
          text: TextSpan(
            text: part11,
            children: <TextSpan>[
              TextSpan(text: part22, style: testWhiteTextStyle()),
            ],
            style: testgreyTextStyle(),
          ),
        ),
        RichText(
          maxLines: 10,
          textAlign: TextAlign.center,
          overflow: TextOverflow.ellipsis,
          text: TextSpan(
            text: part1,
            children: <TextSpan>[
              TextSpan(text: part2, style: testWhiteTextStyle()),
            ],
            style: testBlackTextStyle(),
          ),
        ),
      ],
    );
  }