int[] data = {6, 14, 6, 14};
String[] labels = {"Spring", "Summer", "Fall", "Winter"};
int total;
float[] perc = new float[data.length];
color[] colors = {color(255,165,0), color(255,255,0), 
color(20,220,50), color(135,165,235)};

//The sketch variables
float maxW, maxH, barW, barH, lastX;
float x, y;



void setup(){
  size(500,500);
  background(255);
  smooth();
  noLoop();

  // process
  // compute the total population
  total = 0;
  for (int i=0; i < data.length; i++) {
    total += data[i];
  }

  // compute percentages
  for (int i=0; i < data.length; i++) {
    perc[i] = float(data[i])/total;
  }

  // sketch variables
  maxW = width/(1+data.length);
  maxH = height;
  lastX = 0;
  barW = maxW*0.5;

}//setup

void draw(){ 
 for(int i=0; i<data.length; i++){
    // set up parameters for ith bar
    x = lastX+maxW;
    barH = map(perc[i], 0, 1, 0, maxH);

    // draw the bar(s)
    noStroke();
    fill(colors[i]);
    rect(x, height-barH-50, barW, barH);
    lastX = x;

    // labels
    stroke(0);
    fill(0);
    textSize(12);
    text(data[i], x+barW/2, height-barH-65);
    text(labels[i], x, height-25);
 }
    
  // draw title
  fill(0);
  textSize(24);
  rectMode(CENTER);
  text("Births by Day of Week", 105, 50);
}