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, maxArea, cx, cy, lastX, w;

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);
  maxArea = PI*maxW/2*maxW/2;    // max area of bubble
  cy = height/2;
  lastX = 0;

}//setup

void draw(){ 
 for(int i=0; i<data.length; i++){
    // set up parameters for ith bubble
    cx = lastX+maxW;
    w = 2*sqrt(maxArea*perc[i]/PI);  // size of bubble

    // draw the bubble
    noStroke();
    fill(colors[i]);
    ellipse(cx, cy, w, w);
    lastX = cx;

    // labels
    stroke(0);
    fill(0);
    textSize(12);
    text(labels[i], cx-12, cy+50);
  }

    
  // draw title
  fill(0);
  textSize(24);
  rectMode(CENTER);
  text("Births by Day of Week", 105, 50);
}