#define Led 14
#define Buzzer 19
#include <pitches.h>
import machine
from machine import Pin,PWM
from time import sleep_us,sleep
import utime, math
led1 = Pin(23, Pin.OUT)
led2 = Pin(22, Pin.OUT)

notes = {
    'C': 465,
    'D': 511,
    'E': 566,
    'F': 602,
}
buzzer=Pin(4,Pin.OUT)
buzzer_pwm=PWM(buzzer)
echo=Pin(33,Pin.IN)
trig=Pin(25,Pin.OUT)

while True:
    trig.value(0)
    led1.on ()
    led2.off ()
    sleep_us(2)
    trig.value(1)
    sleep_us(10)
    trig.value(0)
    x=machine.time_pulse_us(echo,1)
    distance=(0.034*x)/2
    print('Distance:',distance,'cm')
    led1.off ()
    if distance <=50:
        
            buzzer_pwm.freq(notes['E'])
            buzzer_pwm.duty(80)
            led2.on ()
            led1.off ()
            sleep(0.5)
            buzzer_pwm.duty(0)
            buzzer_pwm.freq(notes['F'])
            buzzer_pwm.duty(100)
            sleep(0.1)
            buzzer_pwm.duty(0)
            led2.off ()
            sleep(3)
            
    
    elif distance <=100:
        
            buzzer_pwm.freq(notes['C'])
            buzzer_pwm.duty(80)
            led2.on ()
            led1.off ()
            sleep(0.5)
            buzzer_pwm.duty(0)
            buzzer_pwm.freq(notes['C'])
            buzzer_pwm.duty(100)
            sleep(0.1)
            led2.off ()
            buzzer_pwm.duty(0)
           
            sleep(3)
            

    elif distance <=300:
        
            buzzer_pwm.freq(notes['F'])
            buzzer_pwm.duty(80)
            led2.on ()
            led1.off ()
            sleep(0.5)
            buzzer_pwm.duty(0)
            buzzer_pwm.freq(notes['C'])
            buzzer_pwm.duty(100)
            led2.off ()
            sleep(0.1)
            buzzer_pwm.duty(0)
            sleep(1)
    
    elif distance <=400:
            buzzer_pwm.freq(notes['E'])
            buzzer_pwm.duty(80)
            led1.on ()
            led2.off ()
            sleep(0.5)
            buzzer_pwm.duty(0)
            buzzer_pwm.freq(notes['E'])
            buzzer_pwm.duty(100)
            led1.off ()
            sleep(0.5)
            buzzer_pwm.duty(0)
            
            sleep(0.5)