While I was looking at the aquarium I bought on the internet, I pondered...

If I was an engineer, I’d think about the right pressure to generate enough oxygen in the recipient and the mechanical filter. 

If I was a designer, I’d reflect in the color combination of the different fish in relation with how the light hits the algae; or a biologist, and I’d suppose which specie would get along, and how can I create a suitable habitat?

 Or a psychologist and a fiction lover! And I would come up with stories about power struggles between an alpha male and the beta fish. 

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But someday I want to be a Film Director, and in that case I must be able to think about everything at the same time.