A misunderstanding of weights

[MuhammedBuyukkinaci]

First of all, I want to thank you for this great project. I have problems in understanding this part:

WH is a matrix that stays the same across all time steps, and the weight matrix WX is different for each input.

I think this information isn't true according to Andrej Karpathy's great post.

The above specifies the forward pass of a vanilla RNN. This RNN’s parameters are the three matrices W_hh, W_xh, W_hy

Correct me if I am wrong.

Thanks in advance.