diff --git a/examples/mockrun.py b/examples/mockrun.py
new file mode 100755
index 0000000..ae9b98b
--- /dev/null
+++ b/examples/mockrun.py
@@ -0,0 +1,140 @@
+#!/usr/bin/env python
+
+import threading
+import tkinter
+from PIL import ImageTk, Image
+import time
+
+WIDTH = 160 * 4
+HEIGHT = 80 * 4
+
+from unittest import mock
+import sys
+mock_ltr559 = mock.MagicMock()
+mock_ltr559.LTR559().get_lux.return_value = 0.0
+sys.modules['ltr559'] = mock_ltr559
+
+mock_gpio = mock.MagicMock()
+sys.modules['RPi'] = mock.MagicMock()
+sys.modules['RPi'].GPIO = mock_gpio
+sys.modules['RPi.GPIO'] = mock_gpio
+
+
+BUTTONS = [5, 6, 16, 24]
+LABELS = ["Q", "A", "P", "L"]  # A B X Y on PCB
+
+
+MOISTURE_1_PIN = 23
+MOISTURE_2_PIN = 8
+MOISTURE_3_PIN = 25
+
+
+tk_canvas = None
+tk_root = None
+running = False
+image = None
+button_handlers = {}
+
+
+def update_display(new_image):
+    global image
+    image = new_image
+
+mock_st7735 = mock.MagicMock()
+sys.modules['ST7735'] = mock_st7735
+
+
+def grab_dem_button_handlers(pin, edge, callback=None, bouncetime=None):
+    global button_handlers
+    button_handlers[pin] = callback
+    print(f"Adding handler for {pin} on edge {edge}")
+
+
+lib = __import__(sys.argv.pop(1))
+
+def bringup():
+    global mock_st7735, mock_gpio
+    st7735 = mock_st7735.ST7735(
+        port=0, cs=1, dc=9, backlight=12, rotation=270, spi_speed_hz=80000000
+    )
+    st7735.display = update_display
+    mock_gpio.add_event_detect = grab_dem_button_handlers
+    lib.main()
+
+t_main = threading.Thread(target=bringup)
+
+def resize_window(event):
+    pass
+
+def input_window(event):
+    key = event.char
+    try:
+        i = LABELS.index(key.upper())
+    except ValueError:
+        return
+    pin = BUTTONS[i]
+    print(f"You pressed {event.char}, GPIO: {pin}")
+    button_handlers[pin](pin)
+
+def close_window():
+    global running
+    running = False
+    print("You gon' have to press Ctrl+C now 'cos the examples use while True")
+    sys.exit(0)
+
+tk_root = tkinter.Tk()
+tk_root.title("Grow Simulator")
+tk_root.geometry(f"{WIDTH}x{HEIGHT}")
+tk_root.aspect(2, 1, 2, 1)
+tk_root.resizable(False, False)
+tk_root.protocol("WM_DELETE_WINDOW", close_window)
+tk_root.bind('<KeyPress>', input_window)
+
+def wait_for_window_close():
+    global running, tk_canvas, tk_root, image
+    running = True
+
+    m1_last = time.time()
+    m2_last = time.time()
+    m3_last = time.time()
+
+    m1_delay = 1.0 / 15
+    m2_delay = 1.0 / 2
+    m3_delay = 1.0 / 27
+
+    update_last = time.time()
+    update_delay = 1.0 / 10
+
+    while running:
+        try:
+            if time.time() - m1_last >= m1_delay:
+                button_handlers[MOISTURE_1_PIN](MOISTURE_1_PIN)
+                m1_last = time.time()
+            if time.time() - m2_last >= m2_delay:
+                button_handlers[MOISTURE_2_PIN](MOISTURE_2_PIN)
+                m2_last = time.time()
+            if time.time() - m3_last >= m3_delay:
+                button_handlers[MOISTURE_3_PIN](MOISTURE_3_PIN)
+                m3_last = time.time()
+        except KeyError:
+            pass
+
+        if time.time() - update_last < update_delay:
+            continue
+
+        update_last = time.time()
+
+        if image is not None:
+            if tk_canvas is None:
+                tk_canvas = tkinter.Canvas(tk_root, width=WIDTH, height=HEIGHT)
+            tk_photo = ImageTk.PhotoImage(image.copy().resize((WIDTH, HEIGHT), Image.NEAREST))
+            tk_canvas.pack(side='top', fill='both', expand='yes')
+            tk_image = tk_canvas.create_image(0, 0, image=tk_photo, anchor='nw')
+            tk_canvas.bind('<Configure>', resize_window)
+            tk_root.update()
+
+        tk_root.update_idletasks()
+        tk_root.update()
+
+t_main.start()
+wait_for_window_close()