Drop

class Drop {
  float x = random(width*2);
  float y = random(-300, -100);
  float z = random(0, 30);
  float len = map(z, 0, 20, 19, 20);
  float yspeed = map(z, 15, 20, 8, 10);

  void fall() {
    y = y+ yspeed;
    float grav = map(z, 0, 20, 0, 0.2);
    yspeed = yspeed + grav;

    if ( y > height) {
      y = random(-200, -100);
      yspeed = map(z/4, 0, 20, 4, 10);
    }
  }

  void show() {

    float thick = map(z, 0, 40, 2, 3);
    strokeWeight(thick/2);
    stroke(mouseX, random(43, 230), mouseY);
    line(x-y, y+len, x-y+z*2, y-23);
  }
}