Brandon's particle is too good to last...

[Brandonsugar]

Tab 1;

Particle p;
PVector wind = new PVector(0.001,0);

void setup(){
  size(1000,750);
  p = new Particle(random(width),random(height));
}
void draw(){
  background(200,200,255);
  p.run();
  p.applyForce(wind);
}

Tab 2;

class Particle{
  PVector location;
  PVector acceleration;
  PVector velocity;
  int lifeSpan;

  Particle(float xLoc,float yLoc){
    location = new PVector(xLoc,yLoc);
    acceleration = new PVector();
    velocity = new PVector();
    lifeSpan = 255;
    acceleration.mult(0);
  }
  void display(){
    stroke(0,lifeSpan);
    fill(175,lifeSpan);
    ellipse(location.x,location.y,15,15);
  }
  void update(){
    velocity.add(acceleration);
    location.add(velocity);
    lifeSpan -= 2;
  }
  void run(){
  update();
  display();
  }
  void applyForce(PVector f){
    acceleration.add(f);
  }
  void borders(){
    if(location.x > width){
      velocity.x *= -1;
    } else if(location.x < 0){
      velocity.x *= -1;
    }
    if(location.y > height){
      velocity.y *= -1;
    } else if(location.y < 0){
      velocity.y *= -1;
    }
}
}

[Brandonsugar]

Tab 1;

Particle p;
PVector move = new PVector(random(0.01,0.001),random(0.01,0.001));

void setup(){
  size(1000,750);
  p = new Particle(mouseX,mouseY);
}
void draw(){
  background(0);
  p.run();
  p.applyForce(move);

}
void mouseClicked(){
    p = new Particle(mouseX,mouseY);
}

Tab 2;

class Particle{
  PVector location;
  PVector acceleration;
  PVector velocity;
  int lifeSpan;

  Particle(float xLoc,float yLoc){
    location = new PVector(xLoc,yLoc);
    velocity = new PVector();
    acceleration = new PVector();
    acceleration.mult(0);
    lifeSpan = 255;
  }
  void display(){
    stroke(0,lifeSpan);
    fill(255,lifeSpan);
    ellipse(location.x,location.y,20,20);
  }
  void update(){
    location.add(velocity);
    lifeSpan -= 1;
  }
  void run(){
    update();
    display();
  }
  void applyForce(PVector f){
    acceleration.add(f);
  }
  void borders(){
    if(location.x > width){
      velocity.x *= -0.98;
    } else if(location.x < 0){
      velocity.x *= -0.98;
    } 
    if(location.y > height){
      velocity.y *= -0.98;
    } else if(location.y < 0){
      velocity.y *= -0.98;
    }
  }
}