Failed neural network implementation

I guess I need a little more research on Neural Networks. It's very hard to understand for a noob like me. Gosh.



If it's not obvious already, if you look at the Error readings on the right, it's increasing exponentially! It's not suppose to increase that much in such short period of time! So, maybe I'm using neural networks the wrong way, or maybe my code is highly flawed. But at least I briefly know how does the neural network works already. I'm still a little confused with the maths though.