import time
time.sleep(0.1) # Wait for USB to become ready

print("Hello, Pi Pico!")

from machine import Pin,PWM

while True:
    buzzer = PWM(Pin(0))
    buzzer.freq(300)
    buzzer.duty_u16(65534)
    time.sleep(0.5)
    buzzer.duty_u16(0)
    time.sleep(0.1)