void dropLines(int wait) {
  if(newDropline == true) {
    matrix.clear();
    m_X = 16;
    m_Y = 0;
    newDropline = false;
  }
  if(millis() % wait == 0) {

    matrix.drawLine(0,m_Y,8,m_Y,1);
    matrix.drawLine(0,m_Y-1,8,m_Y-1,0);
    matrix.writeDisplay();
    m_Y++;
    if(m_Y == m_X) {
      m_X--;
      m_Y = 0;
    }
    if(m_X == 0) {
      newDropline = true;
    }
  }

}

void rainbowstack(int wait) {
  if(newStack == true) {
    clear_strip();
    stackHeight = 16;
    newStack = false;
    yPos = 0;
  }
  if(millis() % wait == 0) {

    leds[yPos].setHue(map(yPos,0,15,0,255));
    leds[yPos-1].setRGB(0,0,0);
    leds[31-yPos] = leds[yPos];
    leds[31-(yPos-1)].setRGB(0,0,0);
    LEDS.show();
    yPos++;

    if(yPos == stackHeight) {
      stackHeight--;
      yPos = 0;
    }

    if(stackHeight == 0) {
      newStack = true;
    }

  }
}