PSystem ps;

Particle[] ParLine = new Particle[50];
Particle[] ParSpiral = new Particle[50];
float r;

void setup() {
size(500,500);
ps = (PSystem)loadPlugin("PSystem");

framerate(30);

for(int i=0; i<50; ++i) {
  if (i<25) {
  r = i*20.0;
  }
  if (i>24) {
  r = (50-i)*20;
  }
  ParLine[i] = new Particle(width/2,5+i*height/50,0);
  ps.addParticle(ParLine[i]);
  ps.defaultSpringRestLength = 1;
  ps.defaultSpringStrength = 2;
  
  if (i>0) {
    ps.addSpring(ParLine[i], ParLine[i-1]);
    ps.addSpring(ParSpiral[i-1], ParLine[i]);
    }



  ParSpiral[i] = new Particle(width/2 + r*sin(i*2*PI/5), i*height/50, r*cos(i*2*PI/5));
  ps.addParticle(ParSpiral[i]);
  ps.defaultSpringRestLength = r/2;
  ps.defaultSpringStrength = .5;
  ps.addSpring(ParLine[i], ParSpiral[i]);
  
  if (i>4) {
    ps.defaultSpringRestLength = 25;
    ps.addSpring(ParSpiral[i], ParSpiral[i-5]);
    }  
  if (i>0) {
    ps.defaultSpringRestLength = r/2;
    ps.addSpring(ParSpiral[i], ParSpiral[i-1]);
    }
  }

ps.setGravity(0.2);
  
}

void loop() {
  background(0,204,0);
  stroke(200,0,0);
  ParLine[0].setPos(mouseX, mouseY, 0);
  ps.draw();
}