$L=\left\{w \in\{a, b\}^{\*} \mid a a \text { and } b b \text { are substrings in } w\right\}$ in NFA
I draw an intuitive automaton but I'm not sure it is the minimal one: [Here is my attempt.](https://i.stack.imgur.com/x3B9w.png)
I hope someone can lead me.