from tkinter import *
from random import randrange as rnd

def new_rect():
    global x,y,rect
    canvas.delete(rect)
    x = rnd(100,700)
    y = rnd(100,500)
    rect = canvas.create_rectangle(x,y,x+100,y+100,outline="#fb0", fill="#fb0")
    root.after(1000,new_rect)
     
def click(event):
    global points, text
    canvas.delete(text)
    canvas.delete(rect)
    if (event.x - x >= 0
        and event.x - x <= 100
        and event.y - y >= 0
        and event.y - y <= 100
        ):
        points += 1
    
    text = canvas.create_text(20,20,text=str(points), font = 'Arial 20')

root = Tk()
root.geometry('800x600')
 
canvas = Canvas(root,bg='white')
canvas.pack(fill=BOTH,expand=1)

x = 0
y = 0
rect = canvas.create_rectangle(x,y,x+100,y+100,outline="#fb0", fill="#fb0")
text = canvas.create_text(20,20,text=0, font = 'Arial 20')
points = 0
new_rect()
canvas.bind('<Button-1>', click)

 
mainloop()