there are a lot more details needed, specifically the processor (controller), Most demo boards include code and reccomendations for IDE for this exact or similar task, since you already have a board, search the Freescale site for your processor, for such a simple task ( and many more complex) the free version of CodeWarrior would be fine, that is if it supports the processor on the board. If you are just learning Kinetis look for the KDS:Kinetis Design Studio