from microbit import *

cur_image_pos = 0

def checkinput():
    global cur_image_pos
    sleep(100)
    if button_a.get_presses() > 0 and cur_image_pos > 0 :
        cur_image_pos = cur_image_pos - 1
    if button_b.get_presses() > 0 and cur_image_pos < len(imagelist) - 1:
        cur_image_pos = cur_image_pos + 1
    display.show(imagelist[cur_image_pos])

angry = Image("90009:"
              "09090:"
              "09090:"
              "00900:"
              "99999")
imagelist = [angry, Image.ANGRY, Image.SKULL, Image.COW, Image.PACMAN,
            Image.GHOST, Image.SWORD, Image.SNAKE]

while True:
    #display.scroll('Hello, World!')
    #display.show(angry)
    checkinput()