hi everybody,
i'm an absolute beginner of processing...can anybody help me? i need to find the part of the sketch, where i can change the color of the bar charts. also i would like to know how to adapt the length of the ''dropping water'', so that it is as log as the bars in the background. pleaseee :-)



import org.gicentre.utils.stat.*;
BarChart barChart;

boolean click =false;
int a = 1000;
PVector[] pos;
PVector[] vel;

int[] ttl;
float pmx = 0;
float pmy = 0;

float r = 70;
float g = 130;
float b = 220;
float ca = 200;

void setup(){
  size(900,700);
  smooth();
  frameRate(50);
  pos = new PVector[a];
  vel = new PVector[a];
  ttl = new int[a];

  for ( int i = 0; i < a; i++) {
    pos[i] = new PVector(0, 0);
    if (i < a/1000) {
      vel[i] = new PVector(random(-2, 2), random(-5, -5));
      ttl[i] = int(random(10, 50));}
    else {
      vel[i] = new PVector(random(0, 400), random(0, 400));
      ttl[i] = int(random(0, 50));}
     
  barChart = new BarChart(this);
  barChart.setData(new float[]
{978,0, 735,0, 612,0, 450,0, 305,0, 205,0, 94,0, 59,0, 20,0});}
  }

void draw() {
  background(255);
  barChart.draw(60,10,width-60,height-60);
 
  smooth ();
  //fill (255,50,50); //fountaine
  //fill(255); //background
  noStroke();
  //rect(0, 0, width, height);
  stroke(r, g, b,ca);
  smooth();
 
  if(click == true){
    for ( int i = 0; i < a; i++) {
      point( pos[i].x + 80, pos[i].y + 20 );}
    for ( int i = 0; i < a; i++) {
      point( pos[i].x + 175, pos[i].y + 175 );}
    for ( int i = 0; i < a; i++) {
      point( pos[i].x + 270, pos[i].y + 260 );}
    for ( int i = 0; i < a; i++) {
      point( pos[i].x + 362, pos[i].y + 358 );}
    for ( int i = 0; i < a; i++) {
      point( pos[i].x + 455, pos[i].y + 450 );}
    for ( int i = 0; i < a; i++) {
      point( pos[i].x + 550, pos[i].y + 520 );}
    for ( int i = 0; i < a; i++) {
      point( pos[i].x + 642, pos[i].y + 590 );}
    for ( int i = 0; i < a; i++) {
      point( pos[i].x + 737, pos[i].y + 610 );}
    for ( int i = 0; i < a; i++) {
      point( pos[i].x + 832, pos[i].y + 640 );}
     
    pmx = mouseX;
    pmy = mouseY;
    a = 400;
  } else {
    if(a > 1) {
      a = int(a*0.99);
    }
    for ( int i = 0; i < a; i++) {
      point( pos[i].x + pmx, pos[i].y + pmy );
    }
    pmy = pmy * 5.05;
  }
 
  for ( int i = 0; i < a; i++) {
    pos[i].add( vel[i] );
    ttl[i]--;
    if (ttl[i] < 0) {
      vel[i] = new PVector(random(0, -5), random(0, 5));
      pos[i] = new PVector(random(-20, 30), random(-10, 30));
     ttl[i] = int(random(0,100));
    }
  }
}
void mousePressed() {

   ca = random(100, 100);
   strokeWeight(random(5));
  click= true;
}