How can we use external LEDs with Pixhawk. I am planning to use 4 LEDs, 2 of them RED and other two green. There are two input signals for the LEDs. One is for RED LED and other is for GREEN LED. I want to generate different LED patterns based on Pixhawk's status. So, if Pixhawk is armed it should generate one type of pattern. If GPS lock is there another pattern should be used. Similarly some more status options will be there.
What is the best way to make this setup work?