add example

Author: ladyada

README.rst

@@ -29,7 +29,27 @@ This is easily achieved by downloading
 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:: python
+
+	import time
+	import board
+	import busio
+	import adafruit_lidarlite
+
+	# Create library object using our Bus I2C port
+	i2c = busio.I2C(board.SCL, board.SDA)
+
+	# Default configuration, with only i2c wires
+	sensor = adafruit_lidarlite.LIDARLite(i2c)
+
+	while True:
+    	    try:
+                # We print tuples so you can plot with Mu Plotter
+                print((sensor.distance,))
+    	    except RuntimeError as e:
+                # If we get a reading error, just print it and keep truckin'
+                print(e)
+    	    time.sleep(0.01) # you can remove this for ultra-fast measurements!
 
 Contributing
 ============