add example

Author: ladyada

README.rst

@@ -66,8 +66,59 @@ To install in a virtual environment in your current project:
 Usage Example
 =============
 
-.. todo:: Add a quick, simple example. It and other examples should live in the
-examples folder and be included in docs/examples.rst.
+.. code-block:: python3
+
+    import busio
+    import displayio
+    import terminalio
+    from adafruit_display_text import label
+    import adafruit_displayio_sh1106
+
+    displayio.release_displays()
+
+    spi = busio.SPI(board.SCK, board.MOSI)
+    display_bus = displayio.FourWire(
+        spi,
+        command=board.OLED_DC,
+        chip_select=board.OLED_CS,
+        reset=board.OLED_RESET,
+        baudrate=1000000,
+    )
+
+    WIDTH = 128
+    HEIGHT = 64
+    BORDER = 5
+    display = adafruit_displayio_sh1106.SH1106(display_bus, width=WIDTH, height=HEIGHT)
+
+    # Make the display context
+    splash = displayio.Group(max_size=10)
+    display.show(splash)
+
+    color_bitmap = displayio.Bitmap(WIDTH, HEIGHT, 1)
+    color_palette = displayio.Palette(1)
+    color_palette[0] = 0xFFFFFF  # White
+
+    bg_sprite = displayio.TileGrid(color_bitmap, pixel_shader=color_palette, x=0, y=0)
+    splash.append(bg_sprite)
+
+    # Draw a smaller inner rectangle
+    inner_bitmap = displayio.Bitmap(WIDTH - BORDER * 2, HEIGHT - BORDER * 2, 1)
+    inner_palette = displayio.Palette(1)
+    inner_palette[0] = 0x000000  # Black
+    inner_sprite = displayio.TileGrid(
+        inner_bitmap, pixel_shader=inner_palette, x=BORDER, y=BORDER
+    )
+    splash.append(inner_sprite)
+
+    # Draw a label
+    text = "Hello World!"
+    text_area = label.Label(
+        terminalio.FONT, text=text, color=0xFFFFFF, x=28, y=HEIGHT // 2 - 1
+    )
+    splash.append(text_area)
+
+    while True:
+        pass
 
 Contributing
 ============