Simple test

Ensure your image loads with this simple test.

examples/imageload_simpletest.py
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import board
import displayio
import adafruit_imageload

image, palette = adafruit_imageload.load(
    "images/4bit.bmp", bitmap=displayio.Bitmap, palette=displayio.Palette
)
tile_grid = displayio.TileGrid(image, pixel_shader=palette)

group = displayio.Group()
group.append(tile_grid)
board.DISPLAY.show(group)

while True:
    pass