If Dancebot were a football referee... https://github.com/hugs/dancebot

dancebot_touchdown.ino

#include <Servo.h>

Servo head;
Servo leftArm;
Servo rightArm;

int headPosition = 90;
int leftArmPosition = 90;
int rightArmPosition = 90;

void setup() {
  head.attach(9);
  head.write(headPosition);
  
  leftArm.attach(10);
  leftArm.write(leftArmPosition);
  
  rightArm.attach(11);
  rightArm.write(rightArmPosition);  
  
  delay(2000);
}

void loop() {
  leftArmPosition = 0;
  leftArm.write(leftArmPosition);

  rightArmPosition = 180;
  rightArm.write(rightArmPosition);  
  
  delay(2000);
  
  leftArmPosition = 180;
  leftArm.write(leftArmPosition);

  rightArmPosition = 0;
  rightArm.write(rightArmPosition);  
  delay(2000);  
  
}