var x, y;

var bat1, bat2, bat3;

​

function preload(){

  bat1 = loadImage("index.png");

  bat2 = loadImage("bat2.png");

}

​

function setup() {

  createCanvas(640, 500);

  for (var i = 0; i < 500; i++) {

    drops[i] = new Drop();

  }

  angleMode(RADIANS);

}

​

function draw() {

  background(0,0,50);  

  for (var i = 0; i < drops.length; i++) {

    drops[i].fall();

    drops[i].show();    

  }

  ellipseMode(CENTER);

  fill("#FFFFB3");

  noStroke();

  ellipse(560,80,100); 

  fill("grey");

  rectMode(CENTER);

  rect(width/2,height,width,10);

  image(bat1,200,350);

  drawSprites();

  stars();

  image(bat2,520,40,80,80);

}

​

function Drop() {

  this.x = random(width);

  this.y = random(-500, -50);

  this.z = random(0, 20);

  this.len = map(this.z, 0, 20, 10, 20);

  this.yspeed = map(this.z, 0, 20, 1, 20);

​

  this.fall = function() {

    this.y = this.y + this.yspeed;

    var grav = map(this.z, 0, 20, 0, 0.2);

    this.yspeed = this.yspeed + grav;

​

    if (this.y > height) {

      this.y = random(-200, -100);

      this.yspeed = map(this.z, 0, 20, 4, 10);

    }

  };

​

  this.show = function() {

    var thick = map(this.z, 0, 20, 1, 3);

    strokeWeight(thick);

    stroke(50,150,250);

    line(this.x, this.y, this.x, this.y + this.len);

  };

}

​

function stars(){

  noStroke();

  fill(255, 255, 0);

  ellipse(206,9,4);

  ellipse(509,15,4);

  ellipse(376,22,4);

  ellipse(600,25,4);

  ellipse(165,26,4);

  ellipse(558,49,4);

  ellipse(616,59,4);

  ellipse(185,66,4);

  ellipse(585,75,4);

  ellipse(517,77,4);

  ellipse(253,80,4);

  ellipse(303,82,4);

  ellipse(552,85,4);

  ellipse(446,86,4);

  ellipse(305,93,4);

  ellipse(347,95,4);

  ellipse(121,105,4);

  ellipse(407,111,4);

  ellipse(440,114,4);

  ellipse(150,144,4);

  ellipse(188,149,4);

  ellipse(112,172,4);

  ellipse(114,181,4);

  ellipse(337,186,4);

  ellipse(377,188,4);

  ellipse(48,191,4);

  ellipse(279,196,4);

  ellipse(147,197,4);

  ellipse(312,198,4);

  ellipse(28,199,4);

  ellipse(57,9,4);

  ellipse(290,15,4);

  ellipse(156,22,4);

  ellipse(98,25,4);

  ellipse(43,26,4);

  ellipse(2,49,4);

  ellipse(190,59,4);

  ellipse(168,66,4);

  ellipse(124,75,4);

  ellipse(546,77,4);

}