I'm struggling to understand Node.js

Hi

Node.js - Readable Streams

Can someone help me with node.js? Not with the code, but I’m struggling to understand User I/O, Errors, Read and writable streams. I understand the I/O, but as I move on to Errors and Readable streams. I’m getting confused and not understanding. I’ve got CodeCademy Pro, but I’ve been stuck on this for hours.

Thanks