Straight Ahead and Straight Back

#include <Servo.h>;

void setup() {
  Servo servoLeft;
  Servo servoRight;

  servoLeft.attach(12);
  servoRight.attach(11);


  //Forward 1 meter

  servoLeft.writeMicroseconds(1700);
  servoRight.writeMicroseconds(1380);

  delay(6000);

  servoLeft.writeMicroseconds(1300);
  servoRight.writeMicroseconds(1620);

  delay(6000);

  servoLeft.detach();
  servoRight.detach();

}

void loop() {
  // put your main code here, to run repeatedly:

}