pert:
Probably you don't need to do anything special at all. Is there something that's making you think you would need to download special software?
I think it's just more that I'm unsure how to get my sketch to run while I have my arduino plugged into my computer.
Is there anything special I have to do? Is there a way I can start/stop running my sketch with the push of a button, whether it be a mouse click or a toggle switch?