import turtle, random

boki = random.randint(3,9)
dlugosc = random.randint(100,150) - (boki*5)
kolor =["#4ce6d6", "green", "red","blue","purple","orange","yellow","black"]
turtle.pensize(3)
turtle.color("black")
def rysuj_figure(boki,dlugosc,kolor):
    if boki <= 2:
        return turtle.write("error: less than 3 sides given")
    turtle.fillcolor(kolor[random.randint(0, len(kolor)-1)])
    turnAngle = 360/boki
    turtle.begin_fill()
    for i in range(1,boki + 1):
        turtle.forward(dlugosc)
        turtle.left(turnAngle)
    turtle.end_fill()

rysuj_figure(boki, dlugosc, kolor)

turtle.done()