Cobbled some code together from a few places. This be it.

  #! /usr/bin/python

# set lights based on ultrasonic sensor
# merge the adeept ultrasonic code w/ jamhat code
#JAM hat pin usage
# Component     GPIO.BCM    GPIO.BOARD  GPIO Zero object    Notes
# LED1          GPIO 5      Pin 29  lights_1.red    
# LED2          GPIO 6      Pin 31  lights_2.red    
# LED3          GPIO 12     Pin 32  lights_1.yellow     
# LED4          GPIO 13     Pin 33  lights_2.yellow     
# LED5          GPIO 16     Pin 36  lights_1.green  
# LED6          GPIO 17     Pin 11  lights_2.green  
# Button 1      GPIO 19     Pin 35  button_1    Connected to R8/R10
# Button 2      GPIO 18     Pin 12  button_2    Connected to R7/R9
# Buzzer        GPIO 20     Pin 38  buzzer  

# do the needful https://thepihut.com/blogs/raspberry-pi-tutorials/getting-started-with-the-jam-hat
# 
# sudo apt-get update
# sudo apt-get install python3-gpiozero python-gpiozero
# https://github.com/adeept/Adeept_Ultimate_Starter_Kit_Python_Code_for_RPi/blob/master/14_distance.py
# 
# if u r missing stuff, might want to run this: https://raw.githubusercontent.com/adeept/Adeept_RaspTank/master/setup.py
# for ultra, connect trigger to pin 16 (gpio23) and echo to pin 18 (gpio24)
# connect power to pin 4 and ground to pin 6
#
# for the ultrasonic sensor
# https://www.adeept.com/ultrasonic-sr04_p0047.html
# Power supply: 5V DC, quiescent current : <2mA,effectualangle: <15 ranging distance : 2cm~500 cm resolution : 0.3 cm

# 343 m/s * 39.37 inch/m = 13504 inches/s
import RPi.GPIO as GPIO
import time
from gpiozero import JamHat
from random import sample


def checkdist():
    GPIO.output(23, GPIO.HIGH)
    time.sleep(0.000015)
    GPIO.output(23, GPIO.LOW)
    while not GPIO.input(24):
        pass
    t1 = time.time()
    while GPIO.input(24):
        pass
    t2 = time.time()
    return (t2-t1)*13504/2

# batteries to power, turbines to speed
jamhat = JamHat()

jamhat.lights_1.blink()
time.sleep(0.5)
jamhat.lights_2.blink()
jamhat.buzzer.play('C4')
time.sleep(0.5)
#ready to move out
jamhat.off()

GPIO.setmode(GPIO.BCM)
#I guess jamhat sets to BCM?
GPIO.setup(23,GPIO.OUT,initial=GPIO.LOW)
GPIO.setup(24,GPIO.IN)
time.sleep(0.5)
print('Checking distance..')
dist = 999
try:
    while True:
        jamhat.off()
        dist = checkdist()
        print('Distance: %0.2f inches' %dist)
        #print 'Distance: %0.2f m' %checkdist()
        if dist > 20:
            jamhat.lights_1.green.on()
            jamhat.lights_2.green.on()
        if dist > 10 and dist <=20:
            jamhat.lights_1.yellow.on()
            jamhat.lights_2.yellow.on()
        if dist <=10:
            jamhat.lights_1.red.on()
            jamhat.lights_2.red.on()
            jamhat.buzzer.play('C4')
        time.sleep(0.5)
except KeyboardInterrupt:
    GPIO.cleanup()