Create README.md

Author: TheKitty

CircuitPython_Slideshow/README.md

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+## Adafruit Learning System tutorial  - Creating Slideshows in CircuitPython
+
+Make a picture slideshow with an Adafruit CircuitPython board with attached display.
+
+Follow the Adafruit learn guide here: https://learn.adafruit.com/creating-slideshows-in-circuitpython/
+
+**code.py** is the code that will run the slideshow program when the board boots up.
+
+Adafruit invests time and resources providing this open source code,
+please support Adafruit and open-source hardware by purchasing
+products from [Adafruit](https://www.adafruit.com)!
+ 
+MIT license, guide written by Mike Barela, code by Limor Fried
+
+All text above, and the splash screen below must be included in any redistribution
+
+-----------------------
+If you are looking to make changes/additions, please use the GitHub Issues and Pull Request mechanisms.