added 'go again' button to final step. Begun emulating a terminal in javascript (don't ask) as a scary thing to come across should the user not have any particular item on their person. Currently sends the inputted text to a function to 'run the command' and deletes properly with backspace. Some issues regarding navigating flowchart inadvertantly with keyboard need addressing
added fullscreen button and copied some javascript from a tutorial but it doesn't work yet
the command 'exit' now exits the terminal back to the presentation