import machine
import time

# Set up the GPIO pins for the LEDs
led_pin1 = machine.Pin(2, machine.Pin.OUT)
led_pin2 = machine.Pin(3, machine.Pin.OUT)
led_pin3 = machine.Pin(4, machine.Pin.OUT)

def blink_led(pin, duration):
    pin.on()
    time.sleep(duration)
    pin.off()
    time.sleep(0.5)

# Main loop
while True:
    try:
        weight = int(input("Enter your weight in kgs: "))
        height = int(input("Enter your height in cm: "))
        bmi_value = weight / ((height / 100) ** 2)

        if bmi_value > 25:
            blink_led(led_pin1, 3)
        elif bmi_value > 18.9:
            blink_led(led_pin2, 3)
        else:
            blink_led(led_pin3, 3)

    except ValueError:
        print("Invalid input. Please enter a valid integer.")