Drop[] cloud;
int nbDrop;
 
void setup()
{
  smooth();
  size(1280, 720);
  nbDrop = 700; // number of drops
  cloud = new Drop[nbDrop];
  for(int i= 0; i < cloud.length; i++)
  {
    cloud[i] = new Drop(); 
  }
 
}
 
void draw()
{
  background(255);
  for(int i = 0; i < cloud.length; i++)
  {
    cloud[i].draw(); // display my cloud and its drops
  }
}
 
class Drop
{
 
  float x;
  float y;
  float gravityDrop;
  float yPlus; 
  float speedDrop2;
  float etendue1;
  float etendue2;
 
 
 
 Drop() // Constructor
 {
  etendue1 = 0; // beginning cloud
  etendue2 = etendue1+200; // ending of my cloud, it always has a width of 200
  x = random(etendue1,etendue2); 
  y = random(0,height);
  gravityDrop = 0;
  yPlus = random(10,20); //adding random length to my drops so they don't look similar
  speedDrop2 = 0;
 }
 
 void draw()
 {
   display();
   fall();
   move();
 
 }
      void display() 
      {
           // drawing a drop
          line(x,y,x,y+yPlus); 
      }
 
       void fall()
      {
        // Add speed to location.
        y = y + speedDrop2;
        // Add gravity to speed.
        speedDrop2 = speedDrop2 + gravityDrop;
 
        if(y > height) // if the drop hits the ground
        {
          y = random(0,height/3);
          yPlus = random(10,20);
          speedDrop2 = 0; 
        }
 
      }
 
      void move()
      {
       if (mousePressed == true) 
       { // forward
         gravityDrop = 0.5;
         x -=1;
       } 
 
       else
       { // backward
         gravityDrop = 0.8;
         x +=1;   
       } 
      }
 
}