[Tkinter] How to update the gui in a loop without blocking the gui mainloop

[Qnuba]

Hi
I´m trying to make a monitor that show when a host in my network goes offline, but I cant get it to loop the code and update the buttons in silence.
Now I has to exit and runt the script every time I want a update.
I want to put this up on a monitor that show it in real time, and maybe later I want some other information shown to.

#GUI
from tkinter import *


class Application(Frame):
    """ GUI """

    def __init__(self, master):
        """ Initialize the Frame"""
        Frame.__init__(self,master)
        self.grid()
        self.create_widgets()
        

    def create_widgets(self):
        """Create button. """
        import os
        import subprocess
        

        
        #Router
        self.button1 = Button(self)
        self.button1["text"] = "Router"
        self.button1["fg"] = "white"
        self.button1.grid(row=0,column=5,rowspan=1,columnspan=2)
        #Ping
        hostname = "192.168.0.1"
        response = os.system("ping -n 1 " + hostname)
        #response
        if response == 0:
            self.button1["bg"] = "green"
        else:
            self.button1["bg"] = "red"
root = Tk()
root.title("monitor")
root.geometry("500x500")

app = Application(root)

root.mainloop()