from  tkinter import *
import os
path = os.getcwd()
arr = []
for files in next(os.walk('/home/vimart/Python/img/'))[2]:
        arr.append('/home/vimart/Python/img' + "/" + files)
canvas_width = 300
canvas_height =300

master = Tk()

canvas = Canvas(master,
           width=canvas_width,
           height=canvas_height)
canvas.pack()

img = PhotoImage(file="sport.gif")
canvas.create_image(20,20, anchor=NW, image=img)
def chang():
        for pictures in arr:
                canvas.delete("all")
                def change_img():
                        canvas.img= PhotoImage(file = pictures)
                        canvas.create_image(20,20, anchor=NW, image=canvas.img)
                master.after(3000, change_img)
master.after(3000, chang)
mainloop()