from machine import Pin
from hcsr04 import HCSR04
from time import sleep
lr=Pin (19,Pin,OUT)
lo=Pin (4,Pin,OUT)
lv=Pin(2,Pin,OUT)
cap=HCSR04(trigger_pin=5,echo_pin=18,echo_timeout_us=1000000)
while True:
d = cap.distance_cm()
if d>=400:
    lv.on()
    lo.off()
    lr.off()
elif d>=150:
    lo.on()
    lv.off()
    lr.off()
else:
    lr.on()
    lv.off()
    lo.off()
    
sleep(1)