以下是一个基于 MicroPython 的 Raspberry Pi Pico 多线程 demo：

import_thread
import time

def print_time(thread_name, delay):
    while True:
        time.sleep(delay)
        print("%s: %s" % (thread_name, time.ctime(time.time())))

try:
    _thread.start_new_thread(print_time, ("Thread 1", 1, ))
    _thr