Please can you tell me how you made your figures?! Particularly in [this post](https://colah.github.io/posts/2015-08-Understanding-LSTMs/) and very specifically [this image](https://github.com/colah/colah.github.io/blob/master/posts/2015-08-Understanding-LSTMs/img/LSTM3-chain.png). Are you using Tikz or something manual? Thank you for the great blogs.