First, let's create an include folder so we can put our header files. In the root of your project folder, run the following command: mkdir include $2)$ Now, let's go inside that folder: cd include and open a text file called console.h in our editor. vim console.h $3)$ Inside console.h we want to add the function headers for some of the behavior we will need to reference, as well as some constants that will help us in calculations. First we need to add our header guards. Add the following to your console.h file: #ifndef MYOS$\_$INCLUDE$\_$CONSOLE$\_$H #define MYOS$\_$INCLUDE$\_$CONSOLE$\_$H $//$ Future code will go here #endif