1. We have seen in previous episodes how to create many objects at once using a while loop. This time we use a while loop inside a while loop to create a grid of objects. The result is a collection of objects (rectangles or circles in our example) distributed in the screen in a pattern similar to the white and black rectangles in a chess game.
    Using a loop inside a loop is something very common in programming, and we will see more examples in coming episodes.

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Uriel Zarate

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