example. try to fix sphinx build error

Author: FoamyGuy

README.rst

@@ -89,6 +89,12 @@ Or the following command to update an existing version:
 Usage Example
 =============
 
+.. code-block:: python
+
+    speech_blurb_bmp = OnDiskBitmap("example_image.bmp")
+    speech_blurb = AnchoredTileGrid(bitmap=speech_blurb_bmp, pixel_shader=speech_blurb_bmp.pixel_shader)
+    speech_blurb.anchor_point = (0.18, 1.0)
+    speech_blurb.anchored_position = (60, 150)
 
 Documentation
 =============

docs/api.rst

@@ -4,5 +4,8 @@
 .. If your library file(s) are nested in a directory (e.g. /adafruit_foo/foo.py)
 .. use this format as the module name: "adafruit_foo.foo"
 
+API Documentation
+=================
+
 .. automodule:: adafruit_anchored_tilegrid
     :members:

examples/anchored_tilegrid_simpletest.py

@@ -1,3 +1,55 @@
 # SPDX-FileCopyrightText: Copyright (c) 2024 Tim C for Adafruit Industries
 #
-# SPDX-License-Identifier: Unlicense
+# SPDX-License-Identifier: MIT
+"""
+Illustrate usage of the AnchoredTileGrid class.
+
+A speech blurb image is positioned relative to the
+point at the bottom of the blurb.
+"""
+
+import board
+from displayio import Group, OnDiskBitmap, Palette
+from vectorio import Circle
+
+from adafruit_anchored_tilegrid import AnchoredTileGrid
+
+# Reference to built-in display
+display = board.DISPLAY
+
+# palette to use for drawing a circle
+circle_palette = Palette(1)
+circle_palette[0] = 0xFF00FF
+
+# circle object, we'll place our speech blurb near this
+circle = Circle(pixel_shader=circle_palette, radius=20, x=40, y=160)
+
+# initialize a Group and add the circle to it
+main_group = Group()
+main_group.append(circle)
+
+# load the speech blurb bitmap
+speech_blurb_bmp = OnDiskBitmap("example_image.bmp")
+
+# make the background chroma key color transparent
+speech_blurb_bmp.pixel_shader.make_transparent(0)
+
+# initialize an AnchoredTileGrid for the blurb
+speech_blurb = AnchoredTileGrid(bitmap=speech_blurb_bmp, pixel_shader=speech_blurb_bmp.pixel_shader)
+
+# set the anchor point to the bottom point of the speech blurb
+speech_blurb.anchor_point = (0.18, 1.0)
+
+# position it near the circle
+speech_blurb.anchored_position = (60, 150)
+
+# add it to the group
+main_group.append(speech_blurb)
+
+# set our group to root_group, so it gets shown on the display
+display.root_group = main_group
+
+
+while True:
+    # wait forever so our group stays visible
+    pass

examples/example_image.bmp

@@ -0,0 +1,3 @@
+# SPDX-FileCopyrightText: Copyright (c) 2024 Tim C for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT