function setup() {

  createCanvas(500, 500)

  frameRate(15)

}

​

var ufoX =0

​

function draw() {

  background(28, 56, 99)

  //stars

  fill('yellow')

  stroke('white')

  strokeWeight(0)

  for(var stars=1; stars <= 10; stars++)

  {

      ellipse(random(0,500),random(0,350),5,5)

      var rainX = random(0,500)  

      var rainY = random(0,350)

      strokeWeight(1)

      line(rainX,rainY,rainX,rainY+random(10,30))

  }

  //moon

  fill(300)

  stroke(200)

  strokeWeight(3)

  ellipse(440,60,75,75)

  //grass

  fill(42, 105, 66)

  stroke(0)

  strokeWeight(5)

  rect(-100,350,1000,400)

  //ufo

  push()

  translate(ufoX,0)

  strokeWeight(0)

  fill(56, 156, 139)

  triangle(250,100,350,363,150,363)

  strokeWeight(4)

  stroke(0)

  fill(91, 99, 93)

  ellipse(250,130,175,75)

  fill(161, 161, 161)

  ellipse(250,124,175,60)

  fill(153, 204, 197)

  ellipse(250,110,75,60)

  fill(300)

  strokeWeight(0)

  ellipse(232,100,20,20)

  ellipse(243,90,10,10)

  pop()

  if(keyCode == RIGHT_ARROW)

    {

      ufoX = ufoX + 2

    }

  if(keyCode == LEFT_ARROW)

    {

      ufoX = ufoX - 2

    }

​

}