print("Hello, Pi Pico!") 
from machine import Pin 
import utime 
trigger= Pin(3,Pin.OUT) 
echo =Pin(2,Pin.IN) 
def ultra(): 
    trigger.low() 
    utime.sleep_us(2)
    trigger.high() 
    utime.sleep_us(5) 
    trigger.low() 
while echo.value() == 0 : 
    signaloff=utime.ticks_us() 
while echo.value() == 1 : 
    signalon=utime.ticks_us() 
timepassed=signalon - signaloff 
distance=(timepassed * 0.0343) / 2 
print("The distance from object is",distance,"cm") 
while True: 
    ultra()