How do I efficiently control multiple servos?

I am building a robot which has two arms with two servos each(one for vertical axis and one for horizontal axis). The code I would like to use to control them is as follows…

void lookLeft() {
for (pos = centrePos; pos <= 150; pos += servoSpeed) {
vertServo.write(pos);
delay(15);
}
}
void lookRight() {
for (pos = centrePos; pos >= 20; pos -= servoSpeed) {
vertServo.write(pos);
delay(15);
}
}

void lookCentreRL() {
if (pos < centrePos + 5) {
for (pos = 20; pos <= centrePos; pos += servoSpeed) {
vertServo.write(pos);
delay(15);
}
}
if (pos > centrePos + 5) {
for (pos = 150; pos >= centrePos; pos -= servoSpeed) {
vertServo.write(pos);
delay(15);
}
}
}

How can I use the functions to control each servo without having to address each servo in the function it’s self?
I was thinking something like “this_servo” do “said function”.

Thanks for your time.

The code I would like to use to control them is as follows..

Obviously, you don't, because that code moves one servo at a time.

How can I use the functions to control each servo without having to address each servo in the function it's self?

Pass the Servo instance to the function.

Would you be so kind as to provide an example of how to do this?

Thanks

Sicdoc:
Would you be so kind as to provide an example of how to do this?

Thanks

void MoveMyServo(Servo &servoToMove)
{
   for(byte pos = 0; pos<180; pos+=5)
   {
       servoToMove.write(pos);
   }
}

Servo thisOne;
Servo thatOne;

void setup()
{
   // attach the servos to pins
}

void loop()
{
   MoveMyServo(thisOne);
   delay(1000);
   MoveMyServo(thatOne);
   delay(1000);
}

Thank you very much. This helps a lot.

void MoveMyServo(Servo &servoToMove)

Paul, is it strictly necessary to pass the instance of the servo by reference ? It appears to work if you pass it by value but I may just have been lucky when I tested it.

Paul, is it strictly necessary to pass the instance of the servo by reference ?

Probably not, since instances can't really be passed by value. But, I prefer to make it obvious.

Thanks