Moisture sensor with LED help

Hi guys I’m a beginner literally just got an arduino uno and some components with a moisture soil sensor
I want to set up a project with LED indicator lights green red Amber, but not sure where to start any assistance would be greatly appreciated I’m very very new to the sketching code but trying to learn thanks in advance

Take a look at this link for the moisture sensor http://www.seeedstudio.com/wiki/Grove_-_Moisture_Sensor