turtle.onscreenclick() function in Python

The turtle module provides turtle graphics primitives, in both object-oriented and procedure-oriented ways. Because it uses Tkinter for the underlying graphics, it needs a version of Python installed with Tk support.

turtle.onscreenclick()

This function is used to bind fun to a mouse-click event on canvas.

Syntax :

turtle.onscreenclick(fun, btn=1, add=None)

Parameters:

Arguments	Description
fun	a function with two arguments, the coordinates of the clicked point on the canvas.
btn	number of the mouse-button defaults to 1 (left mouse button)
add	True or False. If True, new binding will be added, otherwise it will replace a former binding

Below is the implementation of the above method with an example :

Python3

# import packages
import turtle
import random

# global colors
col = ['red', 'yellow', 'green', 'blue',
       'white', 'black', 'orange', 'pink']

# method to call on screen click


def fxn(x, y):
    global col
    ind = random.randint(0, 7)

    # set screen color randomly
    sc.bgcolor(col[ind])

# set screen
sc = turtle.Screen()
sc.setup(400, 300)

# call method on screen click
turtle.onscreenclick(fxn)

Output :

Here we can find that whenever the user clicks (yellow-colored dot on  arrow) on screen it changes the background color of the turtle graphics window randomly.