[Python] Need help making every petal on a flower a different color

How do make every petal on a flower a different color?

I tried doing this but it resulted in every flower petal being the same color. I'm not sure how I can make every flower petal a different color.

import turtle
import random

not_done = False # guarantees the flower is completely drawn and won't be affected by subsequent button clicks

def set_up():
""" sets up the screen with a title and adds the mouse listener"""
wn = turtle.Screen()
wn.bgcolor("pink")
wn.title("Python Turtle Graphics: Flower Garden")

turtle.delay(0)
turtle.penup()
turtle.setpos(-200, 250) # write a large title
turtle.color('green')
turtle.write('Flower Garden', font = ('Courier', 40, 'bold'))
turtle.onscreenclick(draw_flower)
turtle.hideturtle()

leaf = turtle.Turtle()
stem = turtle.Turtle()

def draw_leaf(fill, r, g, b):
""" draws 1 leaf and fills it if fill is true"""
# todo
leaf.hideturtle()
turtle.colormode(255)

for _ in range(8):
if fill:
leaf.begin_fill()
leaf.fillcolor(r, g, b)

for _ in range(45):
leaf.fd(1)
leaf.left(2)

leaf.lt(90)

for _ in range(45):
leaf.fd(1)
leaf.left(2)

if fill:
leaf.end_fill()

def draw_flower(x, y):
""" draws a flower at (x,y)"""
global not_done
if not_done: # function does not execute if still drawing
return
not_done = True
# todo
stem.penup()
stem.setposition(x, y)
stem.width(5)
stem.pendown()
stem.hideturtle()
stem.right(90)
stem.forward(75)
stem.seth(0)


fill = random.randint(0, 1)
r = random.randrange(256)
g = random.randrange(256)
b = random.randrange(256)

for _ in range(8):
leaf.penup()
leaf.setpos(x, y)
leaf.pendown()
draw_leaf(fill, r, g, b)
leaf.rt(45)


not_done = False # finished drawing the flower - don't add any code below

def main():
set_up()
turtle.shape('turtle')
turtle.speed(0)
turtle.done()

main()


I was told I could use a loop however I'm not able to fully understand what that would look like.

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