Method setup

src/DigitalRainAnimation.hpp:216–224

  }

  void setup(int len_min, int len_max, int spd_min, int spd_max, int frame) {
    line_len_min = len_min;
    line_len_max = len_max;
    line_speed_min = spd_min;
    line_speed_max = spd_max;
    matrixTimeFrame = frame;
    timeFrame = matrixTimeFrame;
    prepareAnim();
  }

  void setTextAnimMode(AnimMode mode, const std::string& msg, int startX = 60, int startY = 60, int frame = 400) {
    _animMode = mode;