from picozero import DistanceSensor, Button, RGBLED
from time import sleep

ds = DistanceSensor(echo=1, trigger=0, max_distance=400)
button = Button(15)
rgb = RGBLED(red=3, green=4, blue=5)

while True:
    if button.is_pressed:
        print('here')
        while True:
            print(ds.distance)
            distCM = ds.distance * 100
            print(distCM)
            if distCM <= 50:
                rgb.color = (255, 0, 0)
            elif distCM > 50 and distCM <= 100:
                rgb.color = (0, 255, 0)
            elif distCM > 100:
                rgb.color = (0, 0, 255)
            sleep(0.1)