Flag on the moon

By Kaustubh Patil
# night sky

bg = rectangle(w=300, h=300, fill="#333333")
show(bg)

# stars

star = circle(r=1, fill="#DDEEFF", stroke="none")
import random
random.seed(1337)
for _ in range(50):
    x, y = random.randint(-150, 150), random.randint(-150, 150)
    show(star | translate(x=x, y=y))

moon = circle(x=0, y=-425, r=400, fill="#EEEEEE")
show(moon)

# flag

flag_width = 150
flag_height = flag_width / 1.1
flag_section_height = flag_height / 3
ashoka_chakra_radius = flag_height / 10

def left_wave(h=25, w=50, fill="white", stroke="black"):
    x, y = -w / 2, 0

    e = ellipse(x=x, y=y, w=w, h=h*2, fill=fill, stroke=stroke)
    r = rectangle(x=x, y=y-h/2, w=w, h=h, fill=fill, stroke="none")
    return e + r


def right_wave(h=25, w=50, fill="white", stroke="black"):
    w = left_wave(h=h, w=w, fill=fill, stroke=stroke)
    return w | rotate(180)


def left_flag_section(fill, stroke="none"):
    w = left_wave(w=100, h=33.3, fill=fill, stroke=stroke)
    r_lower = rectangle(w=100, h=33.3, y=-33.3/2, x=-50, fill=fill, stroke="none")
    return r_lower + w

def right_flag_section(fill, stroke="none"):
    return left_flag_section(fill, stroke) | rotate(180)

def flag(upper_bg, lower_bg):
    left_part = (
        (left_flag_section("orange") | translate(y=flag_section_height * 2)) +
        (left_flag_section("white") | translate(y=flag_section_height)) +
        left_flag_section("green") +
        (left_flag_section(lower_bg) | translate(y=-flag_section_height)))

    right_part = (
        (right_flag_section("green") | translate(y=-flag_section_height)) +
        right_flag_section("white") +
        (right_flag_section("orange") | translate(y=flag_section_height)) +
        (right_flag_section(upper_bg) | translate(y=flag_section_height * 2)))

    ashoka_outline = circle(r=ashoka_chakra_radius, stroke="blue")
    ashoka_spoke = line(x1=0, y1=0, x2=ashoka_chakra_radius, y2=0, stroke="blue")
    ashoka_spokes = ashoka_spoke | repeat(24, rotate(360/24))
    ashoka = ashoka_outline + ashoka_spokes

    return left_part + ((right_part) | translate(y=18, x=-4)) + (ashoka | translate(y=30))


show(flag(upper_bg="#333333", lower_bg="#333333") | scale(0.2) | translate(y=25, x=20))

show(line(x1=0, y1=-25, x2=0, y2=52, stroke="#AAAAAA", stroke_width=3))
show(circle(r=2, y=52, fill="#CCCCCC", stroke="none"))