Adjusting simple (so it should be) shift register coding for a different result

vjpcat:
Ok, I see your point regarding position, but I am confused then by what the Arduino reference says for certain functions in the Servo library in terms of a continuos rotation servo, such as 'write' which is described:

write()

Description

Writes a value to the servo, controlling the shaft accordingly. On a standard servo, this will set the angle of the shaft (in degrees), moving the shaft to that orientation. On a continuous rotation servo, this will set the speed of the servo (with 0 being full-speed in one direction, 180 being full speed in the other, and a value near 90 being no movement).

So, is speed then an incidental outcome of changing the position? I find the description above to mean that speed can be used synonymously as position if the servo has continuos rotation.

What that is saying is you can make a continuous servo turn clockwise, anticlockwise or stop. Sending an intermediate value, e.g. 120, would turn the servo more slowly, but it's speed would not change once set. Nothing to do with its position. But you're not using a continuous rotation servo!

Regardless although I prefer to have a full grasp of the varying terms, is it possible for the LEDs to light on incrementally, as they go off incrementally? I feel I was not clear enough in posing my new question.

Let's say the position is centered and only the center LED is lit. As the knob is turned left or right (the position moves away from center) the LEDs would incrementally light on (in direction knob is turned) and remain on, as they move towards the far left or right (target position?). Upon arriving at the far left or right, five LEDS will be lit (center and four to the left or right of center) and then incrementally turn off as position is returned to center where only the one center LED will remain lit.

I apologize for further complicating, but I just want to clarify as best I can. I feel like I've driven hundreds of miles to get across the street.

We're almost there. One minor point to clear up. Do you want the LEDs to follow the position of the knob (immediate) or the position of the servo (delayed by the time it takes the servo to reach its position). Either can be incremental.