Update README.md

Author: mGalarnyk

README.md

@@ -20,6 +20,7 @@ What is it? | Blog Post/IPython Notebook | Youtube Video
 9: Tuples + Fibonacci Sequence | [9: Tuples + Fibonacci Sequence](https://github.com/mGalarnyk/Python_Tutorials/blob/master/Python_Basics/Intro/PythonBasicsTuples.ipynb) | [9: Tuples + Fibonacci Sequence](https://www.youtube.com/watch?v=gUHeaQ0qZaw)
 10: Dictionaries + Dictionary Manipulation | [10: Dictionaries + Dictionary Manipulation](https://github.com/mGalarnyk/Python_Tutorials/blob/master/Python_Basics/Intro/PythonBasicsDictionaries.ipynb) | [10: Dictionaries + Dictionary Manipulation](https://www.youtube.com/watch?v=LlIqrWJaBcQ)
 11: Word Count (Filter out Punctuation, Dictionary Manipulation, and Sorting Lists)  | [11: Word Count (Filter out Punctuation, Dictionary Manipulation, and Sorting Lists)](https://github.com/mGalarnyk/Python_Tutorials/blob/master/Python_Basics/Intro/PythonBasicsWordCount.ipynb) | [11: Word Count (Filter out Punctuation, Dictionary Manipulation, and Sorting Lists)](https://www.youtube.com/watch?v=l_dIleafLZ8)
+12: While Loops and Prime Numbers | Coming Soon | [While Loops and Prime Numbers](https://youtu.be/apEjxRmIp0I)
 Solving System of Equations | [Solving System of Equations](https://medium.com/@GalarnykMichael/solving-system-of-linear-equations-using-python-645ad1904cec#.z6lw1zyw6) | [Solving System of Equations](https://www.youtube.com/watch?v=AqIrdW2-K6k&)
 
 ## Pandas