from machine import Pin 
import utime 

leds={
    "red":Pin(16,Pin.OUT),
    "green":Pin(18,Pin.OUT),
    "blue":Pin(19,Pin.OUT)
}
while True:
    color=input ("enter color(red,green,blue):").strip().lower()

    if color in leds:
        for led in leds.values():
            led.value(1)

            leds[color].value(0)
    else:
        print("invalid input..enter'red','green' or 'blue'")