No problem hon
Okay, the green is either because your graphics card is sending signals to the screen that it shouldn't, and needs to be fixed. Or your screen is broken.
To decide between the two, try plugging in an external screen, if you get normal functioning than its just your laptop screen, if you dont it may be more serious.
If you have been using your laptop for long periods in hot temperatures, it may be damage cause by overheating and may or may not diminish over time. Give it a day or too, if nothing changes, than it is either something wrong with the graphics card or some other hardware that is related.
Luckily for you, there is little indication that your harddrive is damaged, as then the output would be different to a green screen, so if your laptop is totaled, than your files will be recoverable if you get someone you know and trust to take it out for you and copy it into their PC.
Hope that helps. Failing that you seriously need to try turning it off and on again, you would be surprised how much that can help