'''
Mission 7 - Personal Billboard
Medium Remix 2CC
This project uses pitch instead of MP3 files. Otherwise the
same as Remix 2C 
- It includes a button to break the loop and quit -
'''
from codex import *
from time import sleep

choice = 0
my_list1 = [pics.HAPPY, pics.PLANE, pics.TSHIRT, 
            pics.TIARA, pics.HEART, pics.HOUSE]
my_list2 = [440, 540, 640, 740,
            840, 940, 1040]
LAST_INDEX = len(my_list1) - 1

# MAIN PROGRAM
while True:
    my_image = my_list1[choice]
    my_sound = my_list2[choice]
    display.show(my_image)
    audio.pitch(my_sound, 0.5)
    # sleep is added so tone isn't continuous
    sleep(0.5)

    # scroll forward and backward
    if buttons.was_pressed(BTN_L):
        choice = choice - 1
        if choice < 0:
            choice = LAST_INDEX

    if buttons.was_pressed(BTN_R):
        choice = choice + 1
        if choice > LAST_INDEX:
            choice = 0
    
    # break out of loop and quit
    if buttons.was_pressed(BTN_D):
        break