A Mess up while trying to do some pentagonal stuff

pentagonal_ish.java

PVector center;
PVector point;
float x, y, r, theta;
ArrayList<PVector> newPoints;

void setup() {
  size(700,700);
  background(255);
  r = 100;
  theta = 0;
  x = r * cos(theta);
  y = r * sin(theta);
  center = new PVector(width/2, height/2);
  point = new PVector(x, y);
  
  newPoints = new ArrayList<PVector>();
  
  smooth();
  stroke(0,0,0,80);
  
  rectMode(CENTER);
}

void draw() {
  translate(center.x, center.y);
  drawPent(center);
  ArrayList<PVector> copyOfPoints = new ArrayList<PVector>();
  for(int i = 0; i < newPoints.size(); i++) {
    copyOfPoints.add(newPoints.get(i));
  }
  for(PVector p : copyOfPoints) {
    pushMatrix();
    translate(p.x,p.y);
    drawPent(center);
    popMatrix();
  }
  noLoop();
  saveFrame("WTF" + (int) random(Integer.MAX_VALUE) + ".png");
}

void drawPent(PVector center) {
  for(int i = 0; i < 5; i++) {
    PVector oldPoint = point.get();
    theta += 2*PI/5;
    x = r * cos(theta);
    y = r * sin(theta);
    point.set(x, y, 0);
    line(oldPoint.x, oldPoint.y, x, y);
    
    PVector a = PVector.sub(oldPoint, center);
    PVector b = PVector.sub(point, center);
    PVector ray = PVector.add(a, b);
    PVector midPoint = PVector.add(oldPoint, point);
    ellipse(midPoint.x, midPoint.y, 10, 10);
    print(midPoint.x + "\t" + midPoint.y + "\n");
    line(0, 0, midPoint.x, midPoint.y);
    newPoints.add(midPoint);
  }
}