树莓派 GPIO blink

from tkinter import *import RPi.GPIO as ioimport timeimport threadingdelay=0.1io.setmode(io.BOARD)io.setup(11,io.OUT)def blink():        a=0        while a<36000/2:                io.output(11,1)                time.sleep(delay)                io.output(11,0)                time.sleep(delay)                a+=1t1=threading.Thread(target=blink)def onClick():        t1.setDaemon(True)        t1.start()root = Tk(className='blink')root.geometry('320x240')button = Button(root)button['text']='blink'button['command']=onClickbutton.pack()root.mainloop()