int ballCount = 200;

float ballSize = 10;

float[] xpos = new float[ballCount];
float[] ypos = new float[ballCount];

float[] radius = new float[ballCount];
float angle[] = new float[ballCount];
float ballSpeed[] = new float[ballCount];

float centerX;
float centerY;

void setup(){
  size(700, 700);
  background(0);
  noStroke();
  frameRate(30);
  centerX = width/2;
  centerY = height/2;
  for(int i = 0; i < ballCount; i++) {
    radius[i] = 1.5 * (i + 1);
    xpos[i] = 0;
    ypos[i] = 0;
    angle[i] = 0;
    ballSpeed[i] = i * (.1/ballCount);
  }
}

void draw(){
  background(0);
  
  for(int i = 0; i < ballCount; i++){
      ellipse(xpos[i], ypos[i], ballSize, ballSize);  
      xpos[i] = centerX + cos(angle[i]) * radius[i];
      ypos[i] = centerY + sin(angle[i]) * radius[i];
      angle[i] += ballSpeed[i];
  }
  
}