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

void setup()
{
  size(400,400);
  smooth();
  noStroke();
  background(0);
  
  // loop to initialize all the coordinates of the wanderers
  for (int i=0; i<x.length; i++) {
    // Initialize the i-th wanderer
    x[i] = width/2;
    y[i] = height/2;
  }
}

void draw()
{
  fill(0,3); noStroke();
  rect(0,0,width,height);
  fill(255); stroke(128);
  
  // loop to draw and update each wanderer
  for (int i=0; i<x.length; i++) {
    // Draw the i-th wanderer
    ellipse(x[i],y[i],20,20);
    // Update the i-th wanderer
    x[i] += random(-10,10);
    y[i] += random(-10,10);
  }
}

// START NO NOTES
// code used to capture screenshots
void keyReleased() {
  if(key == '`' && !online) save("sketch.png");
}