from machine import Pin 
from utime import sleep 

led1_pin = Pin(13, Pin.OUT)  
led2_pin = Pin(12, Pin.OUT)
led3_pin = Pin(14, Pin.OUT)  

dp1_pin = Pin(2, Pin.IN)    
dp2_pin = Pin(4, Pin.IN)
dp3_pin = Pin(16, Pin.IN)  
     
##################################### 
###### MAIN ROUTINE 
 
def main():     
    while True:
        sub_led1_off() 
        sub_led2_off()
        sub_led3_off()
 
        dp1_state = dp1_pin.value() 
        dp2_state = dp2_pin.value()
        dp3_state = dp3_pin.value()

        print(dp3_state,dp2_state,dp1_state) 

        # If DP1 is pushed AND DP2 is released 
        if dp1_state == 1 and dp2_state == 0 and dp3_state == 1 : 
                # then LED1 ON  
                sub_led1_on() 
                # then LED2 OFF  
                sub_led2_off()
                # then LED3 OFF  
                sub_led3_off() 
 
        # If DP1 is released AND DP2 is pushed 
        elif dp1_state == 0 and dp2_state == 1 and dp3_state == 1: 
                # then LED1 ON  
                sub_led1_off() 
                # then LED2 OFF  
                sub_led2_on()
                # then LED2 OFF  
                sub_led3_off() 
 
        # If DP1 & DP2 are pushed 
        elif dp1_state == 1 and dp2_state == 1 and dp3_state == 0: 
                # then LED1 ON  
                sub_led1_off() 
                # then LED2 OFF  
                sub_led2_off()
                # then LED2 OFF  
                sub_led3_on() 
 
        # continue loop 
 
##################################### 
###### SUBROUTINE FOR LED 
 
def sub_led1_on(): 
    led1_pin.on() 
    sleep(0.5)  
 
def sub_led1_off(): 
    led1_pin.off() 
    sleep(0.5)   
 
def sub_led2_on(): 
    led2_pin.on() 
    sleep(0.5)  
 
def sub_led2_off(): 
    led2_pin.off() 
    sleep(0.5)

def sub_led3_on(): 
    led3_pin.on() 
    sleep(0.5)

def sub_led3_off(): 
    led3_pin.off() 
    sleep(0.5)   
 
##################################### 
###### EXECUTE MAIN ROUTINE 
 
if __name__ == '__main__': 
    main()