如何使用乌龟在python上更改onclick的背景颜色？

Question

I've been trying to get these colors to trigger with each click in the background using turtle. It would be great if someone could help me thank you in advance for your responses!

    import turtle
    import random


    f = turtle.pen()
    BG=turtle.Screen()
    colors = ['blue', 'red', 'yellow', 'green']
    BG.bgcolor("black")


    richard.pencolor("orange")
    richard.penup()

    def draw(x,y):
    richard.goto(x,y)
    richard.pendown()
    for x in range(360):
    richard.forward(200)
    richard.left(108)
    richard.forward(205)
    richard.left(108)
    richard.forward(210)
    richard.left(108)
    richard.forward(215)
    richard.left(1)
    richard.forward(220)
    richard.left(108)
    richard.forward(225)
    richard.left(108)
    richard.tilt(20)
    richard.speed(90)
    richard.pencolor()
    richard.pencolor(random.choice(colors))
    richard.bgcolor()
    richard.bgcolor(random.choice(colors))
    if(x % 2 ==1):
    richard.bgcolor(random.choice(colors))
    if(x % 2 ==1):
    richard.pencolor(random.choice(colors))
    richard.penup()
    BG.onclick(draw())

Answer 1

Your main issue is this line:

BG.onclick(draw())

We need to pass the draw function itself to onclick() , not the None that draw() returns:

BG.onclick(draw)

A simple example that just changes the background color when the window is clicked:

from turtle import Screen, Turtle
from random import choice

COLORS = ['blue', 'red', 'yellow', 'green']

screen = Screen()
screen.bgcolor("black")

def draw(x, y):
    color = choice(COLORS)

    while color == screen.bgcolor():  # don't use same color twice in a row
        color = choice(COLORS)

    screen.bgcolor(color)

screen.onclick(draw)
screen.mainloop()