How to Constantly Looping Trough List?

Question

Hello i ran on to issue related with threading library i want to have df with constantly updating values through spreadsheet

import pandas as pd
import gspread
from oauth2client.service_account import ServiceAccountCredentials
import time
import threading

scope = ['https://spreadsheets.google.com/feeds',
         'https://www.googleapis.com/auth/drive']
creds = ServiceAccountCredentials.from_json_keyfile_name('.json', scope)
client = gspread.authorize(creds)
querystring = {}
coordinates = []
arrive = []
unit = []

def list_thread():
    threading.Timer(10, list_thread).start()
    sh = client.open('SPREADSHEET')
    sheet2 = sh.worksheet("WORKSHEET")
    coordinates1 = sheet2.col_values(5)
    arrive1 = sheet2.col_values(6)
    unit1 = sheet2.col_values(1)
    for i,n,z in zip(coordinates1,arrive1,unit1):
        coordinates.append(i)
        arrive.append(n)
        unit.append(z)

list_thread()
data_dict = {"COORDINATES": pd.Series(coordinates),
         'UNIT': pd.Series(unit),
         }
df = pd.DataFrame(data_dict, columns=["UNIT","COORDINATES"])

The Point is Whenever i pull this dataframe it should give latest edited values from spreadsheet