PSystem ps;
Particle p[];

void setup() {
  size(600,600);
  ps = (PSystem)loadPlugin("PSystem");
  ps.defaultSpringRestLength = 0.2;
  ps.defaultSpringStrength = 0.0004;
  
  Particle p[] = new Particle[100];
 
   for (int i = 1; i < 100; i++) {                 // creates particles
    float webX;
    float webY;  
    float radius = i*18;
    webX = radius * cos(i*45) + 900;               // position for each particle on X axis
    webY = radius * sin(i*45) + 900;               // position for each particle on Y axis
    p[i] = new Particle(webX/3, webY/3, 0);
    ps.addParticle(p[i]);                
    }
    
   for (int j = 1; j < 99; j++)    {               //primary (linear) springs
    ps.addSpring(p[j], p[j+1]);
    }  
    
   for (int k = 1; k < 94; k++)    {               //secondary springs 
    ps.addSpring(p[k], p[k+6]);
    }
    
   for (int m = 94; m < 100; m++)   {              //fixed frame
    p[m].fix();
    }

  ps.setGravity(0, 0, -0.00001);                   //pulls 'down'
}
void loop() {
background(255, 204, 0);    
ps.draw();
}