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hey guys whats up my name is gabe and this is games with gabe and today is the next episode of the game engine concepts tutorial series so what were going to be talking about in this particular episode is something called the command pattern and i have in subtext implementing undo and redo so this pattern can be used to implement an undo redo system or some other cool things that we will discuss in a minute now before we do begin talking about this some of you might not know what a pattern is and thats fine when i first figured out about patterns i was like this is cool but i dont see a use for it now im actually using them because they are very useful so what a pattern is its something called programming pattern specifically its something that supersedes any programming language and its a concept that ends up finding its way into your programs very often and so some programmers in the late 90s i believe called the gang of four decided to create a book called programming patte