To prepare for the coming tutorials, we will use a text-editor. What is a text editor? A text editor is system/program that allow you to edit text, in our case edit our code. The are payed and free text editors, your machine most probably has a basic one. If the is a certain editor that you are using already thats fine, if you are a beginner download one here https://www.sublimetext.com/3 this will be the one I am using.