Complex analysis visualization (Cauchy Theorem, Residue Theorem)?

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I usually think of complex functions on the complex plane like vector fields. So basically what I have problems with is visualizing firstly Holomorphic functions. I have also read and successfully understood the proofs of the Cauchy Theorem over cycles as well as the Residue Theorem (Rudin) and some of their applications. I would like to know if any of you has a way of visualizing or making these theorems more intuitive as to why they happen.