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diff --git a/circuitpython/frozen/Adafruit_CircuitPython_HID/examples/hid_simpletest.py b/circuitpython/frozen/Adafruit_CircuitPython_HID/examples/hid_simpletest.py
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+++ b/circuitpython/frozen/Adafruit_CircuitPython_HID/examples/hid_simpletest.py
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+# SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries
+# SPDX-License-Identifier: MIT
+
+import time
+import board
+import digitalio
+import usb_hid
+from adafruit_hid.mouse import Mouse
+
+mouse = Mouse(usb_hid.devices)
+
+# define buttons. these can be any physical switches/buttons, but the values
+# here work out-of-the-box with a CircuitPlayground Express' A and B buttons.
+up = digitalio.DigitalInOut(board.D4)
+up.direction = digitalio.Direction.INPUT
+up.pull = digitalio.Pull.DOWN
+
+down = digitalio.DigitalInOut(board.D5)
+down.direction = digitalio.Direction.INPUT
+down.pull = digitalio.Pull.DOWN
+
+while True:
+    # scroll up one unit (varies with host/OS)
+    if up.value:
+        mouse.move(wheel=1)
+
+    # scroll down one unit (varies with host/OS)
+    elif down.value:
+        mouse.move(wheel=-1)
+
+    time.sleep(0.1)