import tkinter as tk
root=tk.Tk()
root.geometry("500x500+450+100")
canvas1=tk.Canvas(root, width=500, heigh=500)
canvas1.pack()
x=250
y=250
def keypressed(k):
    global x
    global y
    if k.keysym=='Up':
        y+=-1
    if k.keysym=='Down':
        y+=1
    if k.keysym=='Left':
        x+=-1
    if k.keysym=='Right':
        x+=1
    text=tk.Label(root, text= 'X', fg='yellow', bg='blue')
    canvas1.create_window(x,y, window=text)

root.bind('<KeyPress>', keypressed)
root.mainloop()