Kahoot Game Controller Lights

I am planning on making a Controller designed for Kahoot. I have Ideas for Answering, but I have an Idea I need assistance working out. I would like to use a Red LED to indicate an Incorrect answer and a Green one to Indicate a Correct one. Might anyone have any Ideas on how I might go about doing this?

Start by following this link: How to get the best out of this forum - Using Arduino / Project Guidance - Arduino Forum

Then update Your question.

How do thing KAHOOT would send this information through the serial port to the Arduino?