Pythonは自動タイミングで開いてページを閉じてページをリフレッシュする

if __name__ == '__main__':
    print('CSDN    ')

#coding=utf-8
from selenium import webdriver
import time

user="Adam`   "
password="CSDN：https://blog.csdn.net/l_mloveforever"
opt = webdriver.ChromeOptions()                 #     
driver = webdriver.Chrome(options=opt)          #       
driver.get('https://i.csdn.net/#/user-center/draw?spm=1011.2124.3001.5351') #    
driver.maximize_window()                      #     
time.sleep(2)                                   #    
driver.find_element_by_link_text("      ").click()
time.sleep(2)                                   #    
driver.find_element_by_css_selector("[placeholder='   /  /   ']").send_keys(user)
time.sleep(2)                                   #    
driver.find_element_by_css_selector("[placeholder='  ']").send_keys(password)
time.sleep(2)
driver.find_element_by_css_selector("button").click()