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hey guys whatamp;#39;s 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 weamp;#39;re 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 thatamp;#39;s fine when i first figured out about patterns i was like this is cool but i donamp;#39;t see a use for it now iamp;#39;m actually using them because they are very useful so what a pattern is itamp;#39;s something called programming pattern specifically itamp;#39;s something that supersedes any programming language and itamp;#39;s 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