jquery change event

[hargi]

Having a practice with jquery making a code cracking app
4 text boxes and if the number in the box matches a stored variable the div should change a different color

Codepen here http://codepen.io/anon/pen/RaOxmL

I think i'm using the .change right but it doesnt seam to be doing anything.

Any pointers?

 

[hargi]

if i manually add the .warning class then it works and shows red all the way across