#include <Servo.h>

Servo servo1;
Servo servo2;
Servo servo3;


void setup() 
{
  servo1.attach(9);
  servo2.attach(10);
  servo3.attach(11);

}

void loop() 
{
  for (int pos = 0; pos <= 180; pos+= 1)
  {
    servo1.write(pos);
    servo2.write(180 - pos);
    servo3.write(pos/2);

    Serial.print("Servo 1; ");
    Serial.print(pos);
    Serial.print("Servo 2: ");
    Serial.print(180 - pos);
    Serial.print("Servo 3: ");
    Serial.print(pos / 2);

    delay(15);
  }

}