Gizmo giz[] = new Gizmo[30];

void setup () {
  size (550, 200);
  background (76, 76, 75);
  stroke (236);
  
  for (int i=0; i < giz.length; i++) {
    float x = random (width);
    float y = random (height);
    giz[i] = new Gizmo (x, y);
  }
}

void draw () {
  for (int i=0; i < giz.length; i++) {
    giz[i].move ();
    point (giz[i].position.x, giz[i].position.y);
  }
}

class Gizmo {
  
  PVector position;
  PVector target;
  
  Gizmo (float theX, float theY) {
    position = new PVector (theX, theY);
    target   = new PVector ();
    newRandomTarget ();
  }
  
  void move () {
    PVector step = new PVector ();
    step.set (position);
    step.sub (target);
    step.div (40);
    position.sub (step);
    
    if (position.dist (target) < 3) {
      newRandomTarget ();
    }
  }
  
  void newRandomTarget () {
    target.x = random (width);
    target.y = random (height);
  }
}