Code Sketch

// By Aditya Hasteer Sharma

cleari()
setSpeed(superFast)
setBackground( ColorMaker.hsl(215, 0.38, 0.64))

// the mountains part

def mountain(n: Double) = Picture.fromVertexShape { s =>
    import s._
    beginShape()
    curveVertexRt(-250, 0)
    curveVertexRt(-250, 0)
    curveVertexRt(n, 100)
    curveVertexRt(n, 0)
    curveVertexRt(n, 0)
    endShape()
}

def mountains(num: Int, size: Double): Picture = {
    if (num == 1) {
        mountain(size)
    }

    else {
        fillColor(cm.green) * penColor(Color(44, 130, 51)) -> picStack(
            mountain(size),
            trans(size * 1.9, 0) -> mountains(num - 1, size)
        )
    }
}

val m = mountains(3, 150)
setPosition(800, 480)

// Now the birds part

def bird(n: Double) = penColor(black) * scale(1) -> Picture {
    right(90)
    right(60, n)
    left(120)
    right(60, n)
}

def birds(num: Int, Size: Double): Picture = {
    if (num == 1) {
        bird(Size)

    }
    else {
        picStack(
            bird(Size),
            trans(Size * 1.1, Size * 0.7) -> birds(num - 1, Size * 0.9)
        )
    }
}

val sun = Picture {
    setPenColor(yellow)
    setFillColor(orange)
    circle(70)
}

val scenery = picStack(
    m,
    trans(400, 200) -> birds(10, 50),
    trans(200, 200) -> sun
)

draw(scenery)

setPosition(-150, -50)

hop(-300)

val a = trans(-300, -350) -> Picture {
    setFillColor(ColorMaker.hsla(227, 0.90, 0.63, 0.80))
    setPenColor(noColor)
    repeat(2) {
        forward(350)
        right()
        forward(1500)
        right()
    }
}

draw(a)

// Now the Trees part

def branch(size: Double): Picture = Picture {
    forward(size)
}

def tree(n: Int, size: Double): Picture = {

    if (n == 1) {
        branch(size)
    }
    else {
        picStack(
            branch(size),
            trans(0, size) * rot(30) -> tree(n - 1, size - 10),
            trans(0, size) * rot(-30) -> tree(n - 1, size - 10),
        )
    }
}

val tpic1 = scale(0.2) * penColor(Color(12, 83, 12)) * penThickness(10) * trans(-200, 0) -> tree(10, 100)
val tpic2 = scale(0.2) * penColor(Color(12, 83, 12)) * penThickness(10) * trans(1200, 0) -> tree(10, 100)

val tpic3 = scale(0.2) * penColor(Color(12, 83, 12)) * penThickness(10) * trans(2700, 0) -> tree(10, 100)

val jaja = picStack(
    scenery,
    scenery
        .withFading(300)
        .withBlurring(20)
        .withFlippedY
        .withTranslation(0, 3),
    tpic1,
    tpic1
        .withFading(300)
        .withBlurring(20)
        .withFlippedY
        .withTranslation(0, 3),
    tpic2,
    tpic2
        .withFading(300)
        .withBlurring(20)
        .withFlippedY
        .withTranslation(0, 3),
    tpic3,
    tpic3
        .withFading(300)
        .withBlurring(20)
        .withFlippedY
        .withTranslation(0, 3)
)
draw(jaja)