import machine
import time


speaker=machine.PWM(machine.Pin(15))
speaker.duty_u16(int(65535/2))


speaker.freq(220)
time.sleep(1)
speaker.freq(233) 
time.sleep(1)
speaker.freq(246)
time.sleep(1) 
speaker.freq(261) 
time.sleep(1)
speaker.freq(277) 
time.sleep(1)  
speaker.freq(293)
time.sleep(1)
speaker.freq(311) 
time.sleep(1)
speaker.freq(329)
speaker.duty_u16(0)


while True:
    # Play each frequency for 1 second
    speaker.freq(220)
    time.sleep(1)
    speaker.freq(233)
    time.sleep(1)
    speaker.freq(246)
    time.sleep(1)
    speaker.freq(261)
    time.sleep(1)
    speaker.freq(277)
    time.sleep(1)
    speaker.freq(293)
    time.sleep(1)
    speaker.freq(311)
    time.sleep(1)
    speaker.freq(329)
    time.sleep(1)