I have decided that my idea (4) is going to be a lot harder than I thought. I am going to start with something a lot easier, so I have something by friday, and then hopefully develop it further. I will try to make a ball drop and then as it crosses the 'bars' it will make a sound. As you click on the bars this will change the sound and colour. I will still have to learn a lot to achieve this as my programming skills are not that great. My goal is to create this idea that i have and then improve my processing skills to make it more interactive and interesting. For example, include dragging of the bars.