So imagine you have a toy airplane that you can control with a remote. Now imagine that the airplane is really tiny, like the size of a bug.
Scientists have made a special computer program called the "virtual fly brain" that can simulate what this tiny bug brain would look like and how it would work. They did this by studying real fly brains and figuring out what all the different parts do, like how they control things like movement and vision.
This virtual fly brain can be used by scientists to run experiments and learn more about how these bugs think and behave. It's like a video game where the scientists can simulate different scenarios and see how the virtual fly responds.
By using the virtual fly brain, scientists hope to learn more about how our own brains work too, since there are some similarities between the brains of bugs and humans. Pretty cool, huh?