// Dartmouth CS 2, Winter 2009, Chris Bailey-Kellogg
// Notes 12 | Sketch 1

// How many wanderers
int num=5;
// Their positions
float[] x = new float[num];
float[] y = new float[num];

void setup()
{
  smooth();
  noStroke();
  background(0);
  for (int i=0; i<x.length; i++) {
    // Initialize the i-th wanderer
    x[i] = random(width);
    y[i] = random(height);
  }
}

void draw()
{
  fill(0,3);
  rect(0,0,width,height);
  fill(255);
  for (int i=0; i<x.length; i++) {
    // Draw the i-th wanderer
    ellipse(x[i],y[i],5,5);
    // Update the i-th wanderer
    x[i] += random(-2,2);
    y[i] += random(-2,2);
  }
}