Diagonal Particles - OpenProcessing

sketch380186
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Mover[] m1 = new Mover[400];
​
void setup(){
  size(640, 480);
  background(0);
  for (int i = 0; i < m1.length; i++)
  {
    m1[i] = new Mover(int(random(width)), int(random(height)), int(random(7)+1));
  }
}
​
void draw(){
  //background(0);
  noStroke();
  fill(0, 50, 75, 20);
  rect(0, 0, width, height);
  for (int i = 0; i < m1.length; i++)
  {
    m1[i].display();
  }
}
​
class Mover {
​
  int x;
  int y;
  int xspeed;
  int yspeed;
  int diameter = 13; // Added a new variable, 'diameter' to change size
  color rgb;
​
  Mover(int _x, int _y, int _speed) {
    x = _x;
    y = _y;
    xspeed = yspeed = _speed;
    rgb = color(random(50, 255), random(50, 255), random(100));
  }
​
  void display() {
    if(x<0 || x>width){ //If Mover goes off screen, reverse direction
      xspeed *= -1;
    }
    
    if(y<0 || y>height){ //If Mover goes off screen, reverse direction
      yspeed *= -1;
    }
    
    // If Mover is close to mouse, make its diameter increase
    if (abs(y-mouseY)<100 && abs(x-mouseX)<100)  
    {
      diameter +=1;
    }
    else{
      diameter = 13;
    }
    
    x = x + xspeed;
    y = y + yspeed;
    //stroke(100, 50, 0);
    // Random flicker fill
    //fill(random(50, 255), random(50, 255), random(50, 255));
    fill(rgb);
    ellipse(x,y,diameter,diameter);
  }
​
}