Get Em Fast

Thanks for all your contributions and help to this thread so far. However ive litterally just scrolled through the whole thread to find that you have not given the full css script that allows images instead of block colours.

I wish to have 3 different images, 1 image with an arrow on to indicate further trees, 1 image that is plain to indicate no further trees and a hover image.

Could you please supply the css to accomodate this. I had a go myself with no luck!

Many thanks!