// Based on Greenberg Appendix A-13

Spring[] springs = new Spring[30];

void setup()
{
  size(400,300);
  smooth();
  
  // Evenly space the springs across the window,
  // with a bit of margin (25 on each side)
  float boxR = 0.5*(width-50.0)/springs.length;
  float x0 = 25 + boxR;
  for (int i=0; i<springs.length; i++)
    springs[i] = new Spring(2*boxR*i+x0,height/2, boxR); 
}

void draw()
{
  background(0);
  // Our usual convention: draw and update each object
  for (int i=0; i<springs.length; i++) springs[i].draw();
  for (int i=0; i<springs.length; i++) springs[i].update();
}

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