Code Sketch

// By Aditya Hasteer Sharma

cleari()
setSpeed(superFast)
//showGrid()
//showAxes()
setBackground(cm.white)
setBackground(Color(50, 158, 255))

// the mountains part

def mountain(n: Double) = Picture.fromVertexShape { s =>
    import s._
    beginShape()
    curveVertexRt(n, 0)
    curveVertexRt(n, 0)
    curveVertexRt(n, 90)
    curveVertexRt(n, 180)
    curveVertexRt(n, 180)
    endShape()
}

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

    else {
        fillColor(cm.brown) * penColor(noColor) -> 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 scenery = picStack(
    m,
    trans(400, 200) -> birds(10, 50)
)

draw(scenery, m)

setPosition(-150, -50)

setFillColor(cm.green)
setPenColor(noColor)
repeat(2) {
    forward(50)
    right()
    forward(870)
    right()
}

setPosition(220, 200)
setPenColor(yellow)
setFillColor(orange)
circle(70)