Selecting servo

Other Hardware Motors, Mechanics, Power and CNC
1

Hello.
I have a little problem.
I would like to control four RC servos by one potentiometer, but not all at once. I would like to have two push buttons to choose servo (left and right).
Look at the image:

I run the program. Servo #1 is default chosen = I can control the position of a servo with a potentiometer (just like in tutorial: http://arduino.cc/en/Tutorial/Knob). Then i press pushbutton RIGHT and I can control servo #2; then #3 and #4. Pushing button LEFT analogical.

Any ideas how to do it? Any help?

Next step will be adding 2x16 LCD and printing on it current chosen servo and its position (in degrees?).

2

Completely untested pseudo-code to get you started:

Set ServoNumber = 1

Loop:

	Read PotentiometerValue
	Read LeftButton
        Read RightButton

	If LeftButton is Pressed, decrement ServoNumber
        If RightButton is Pressed, increment ServoNumber

	If ServoNumber > 4, Set ServoNumber = 1
        If ServoNumber < 1, Set ServoNumber = 4

        SetServoPosition ServoNumber, PotentiometerValue