PWM Servo via IR

AWOL:
Apart from the servo write in setup, you're always writing 15 to the servo.

I thought that's how I would be able to move the servo 15 degreesor millis every time I hit the button. I'm just tring to use 2 buttons on a remote to move the servo in either direction. I clearly do not have the knowladge to do this and there is nothing similar online that I have found to use for a clear referance.