B-5-3

import pyxel
import random

pyxel.init(200, 200)
pyxel.cls(7)

def get_random_color():
    return random.randint(0, 15)


for a in range(0, 101, 10):
    pyxel.line(a, 0, a+100, 200, get_random_color())


for a in range(0, 201, 10):
    pyxel.line(a, 0, random.randint(0, 200), 200-a, get_random_color())


for a in range(0, 201, random.randint(10, 30)):
    for b in range(0, 201, random.randint(10, 30)):
        pyxel.line(a, random.randint(0, 200), b, 200, get_random_color())

for a in range(10, 200, random.randint(10, 30)):
    for b in range(10, 200, random.randint(10, 30)):
        if ((a-10)/20) % 2 == 0:
            if ((b-10)/20) % 2 == 0:
                pyxel.circ(a, b, random.randint(5, 20), get_random_color())
            else:
                pyxel.circ(a, b, random.randint(5, 20), get_random_color())
        else:
            if ((b-10)/20) % 2 == 0:
                pyxel.circ(a, b, random.randint(5, 20), get_random_color())
            else:
                pyxel.circ(a, b, random.randint(5, 20), get_random_color())


for a in range(10, 200, random.randint(10, 30)):
    for b in range(10, 200, random.randint(10, 30)):
        if a + b <= 100:
            pyxel.circ(a, b, random.randint(5, 20), get_random_color())
        elif a + b <= 200:
            pyxel.circ(a, b, random.randint(5, 20), get_random_color())
        elif a + b <= 300:
            pyxel.circ(a, b, random.randint(5, 20), get_random_color())
        elif a + b <= 400:
            pyxel.circ(a, b, random.randint(5, 20), get_random_color())

pyxel.show()