license in ReadMe

README.md

@@ -13,3 +13,9 @@
 <h4 align="center">Usage</h4>
 <p  align="center">1. Upload and run the code "send" on an Arduino Mega (needs many pins) which is connected to the capacitive sensors <a href="https://playground.arduino.cc/Main/CapacitiveSensor?from=Main.CapSense">(Arduino Library)</a>.</p>  
 <p  align="center">2. Upload and run the code "receive" on another Arduino, which is connected to the LEDs <a href="https://github.com/adafruit/Adafruit_NeoPixel">(Arduino Library)</a>.</p>
+<br><br>
+<h4 align="center">Attribution Requirements</h4>
+<p align="center">As an open source project, attribution is critical from a legal, practical and motivational perspective. Please give us credits! Common places for attribution are for example: to mention us in your project README, the 'About' section or the footer on a website/in mobile apps. </p>
+<br><br>
+<h4 align="center">License</h4>
+<p align="center">This work is licensed under the GNU General Public License v3.0 license. View LICENSE.txt for details.</p>