void slider(float rainfall) {
  RainNumber = floor((rainfall/2.1)*100.0);
  
  double minDist = abs((float)data[0][0]-rainfall);
  for(int i = 0; i<Arraysize; i++){
    double curDist = abs((float)data[i][0]-rainfall);
    if(curDist>minDist){
      Index = Index;
    }
    else{
      Index = i;
    }
    minDist = curDist;
  }

println(Index);
  setCurrent();

}
  
void silderSetup(Slider s){
  s.disableSprite();
//  ControlP5.disableColorBackground(); 
  int visOpaque = 40;
  int inactive = color(255,255,255, 2*visOpaque);
  int active = color(255,255,255, 4*visOpaque);
  int black_invis = color(255,255,255,40);
//  controlP5.setColorForeground(); //<--- ???
  s.setColorActive(active);
  s.setColorForeground(inactive);
  s.setColorBackground(black_invis);
  s.setLabel(" ");
//  s.setLabel("");
//  ctrlfont = new ControlFont(font0,20);
//  ctrlfont.setSmooth(true);
//  s.captionLabel().setControlFont(ctrlfont); 
}
//nf(