Final experiment

So I have found out how to stop my dot going off the screen and I am a happy man. I am pretty happy with this code and I am going to really work on this for my final and try and get way more dots on the screen.
Here is a picture of it, it probably looks like every other picture of mine on this project.

My tutors suggested I use arrays to put heaps of objects on the screen so I am going to try and get them working, maybe do some tutorials and surf the net for some examples.