Processing Code:

//import all the twitter libraries
import twitter4j.conf.*;
import twitter4j.*;
import twitter4j.auth.*;
import twitter4j.api.*;
import java.util.*;
import processing.serial.*;


//make a twitter object
Twitter twitter;



//lines from our text file
String [] lines;

Serial myPort;
String val = null;

//our search string
String searchString = "#group22Yes";
String searchString2 = "#group22No";

//a list of type status from the API
List<Status> tweets;
List<Status> noTweets;


int currentTweet;

int listSize;
int listSizeNo;

void setup()
{


    size(800,200);
    String portName = Serial.list()[1];
    String portName2 = Serial.list()[0];
    myPort = new Serial(this, portName, 9600);
    //setup an array to hold every line of the text file
    lines = loadStrings("secrets.txt");

    //sets up each line of the text file to the corresponding key
    ConfigurationBuilder cb = new ConfigurationBuilder();
    cb.setOAuthConsumerKey(lines[0]);
    cb.setOAuthConsumerSecret(lines[1]);
    cb.setOAuthAccessToken(lines[2]);
    cb.setOAuthAccessTokenSecret(lines[3]);

    TwitterFactory factory = new TwitterFactory(cb.build());

    twitter = factory.getInstance();
}

void draw()
{
  getYesTweet();
  getNoTweet();

  calculateAngle();

  delay(60000);
}


void tweet(String val)
{
    try
    {
        Status status = twitter.updateStatus(val + hour() + ":" + minute() +":" + second() + " via Arduino");
        System.out.println("Status updated to [" + status.getText() + "].");
    }
    catch (TwitterException te)
    {
        System.out.println("Error: "+ te.getMessage());
    }
}

//gets the new tweets
void getYesTweet()
{

    //try the search
    try
    {
        Query query = new Query(searchString);
         query.setCount(100);
        QueryResult result = twitter.search(query);

        tweets = result.getTweets();

        listSize = tweets.size();

        System.out.println("No of " + searchString + ": "  + listSize);



    }
    //if there is an error then catch it and print it out
    catch (TwitterException te)
    {
        System.out.println("Failed to search tweets: " + te.getMessage());
        System.exit(-1);
    }
}

//gets the new tweets
void getNoTweet()
{


    //try the search
    try
    {


        Query query = new Query(searchString2);
         query.setCount(100);
        QueryResult result = twitter.search(query);

        noTweets = result.getTweets();

        listSizeNo = noTweets.size();

                System.out.println("No of " + searchString2 + ": "  + listSizeNo);





    }
    //if there is an error then catch it and print it out
    catch (TwitterException te)
    {
        System.out.println("Failed to search tweets: " + te.getMessage());
        System.exit(-1);
    }
}

void calculateAngle()
{
    float total;
    float angle;

    total = listSize + listSizeNo;

    angle = (listSizeNo / total) * 180;

    System.out.println(Math.round(angle));
}


Arduino code:

#include <Servo.h>
Servo myservo;

const int tweetButtonPin = 2;    // the number of the pushbutton pin
const int searchButtonPin = 4;    // the number of the pushbutton pin
const int ledPin = 13;      // the number of the LED pin

int counter = 0;

int ledState = HIGH;
int tweetButtonState;
int lastTweetButtonState = LOW;

int searchButtonState;
int lastSearchButtonState = LOW;

// the following variables are long's because the time, measured in miliseconds,
// will quickly become a bigger number than can be stored in an int.
long lastTweetDebounceTime = 0;
long tweetDebounceDelay = 50;
long lastSearchDebounceTime = 0;
long searchDebounceDelay = 50;



int pos = 0;

void setup()
{
  Serial.begin(9600);
  myservo.attach(9);
}

void loop()
{
  // read the state of the switch into a local variable:
  int tweetButtonReading = digitalRead(tweetButtonPin);
  int searchButtonReading = digitalRead(searchButtonPin);
// check to see if you just pressed the button
  if (tweetButtonReading != lastTweetButtonState)
  {
    // reset the debouncing timer
    lastTweetDebounceTime = millis();
  }

  if (searchButtonReading != lastSearchButtonState)
  {
    // reset the debouncing timer
    lastSearchDebounceTime = millis();
  }

  if ((millis() - lastTweetDebounceTime) > tweetDebounceDelay)
  {
    // whatever the tweetButtonReading is at, it's been there for longer
    // than the debounce delay, so take it as the actual current state:
    // if the button state has changed:
    if (tweetButtonReading != tweetButtonState)
    {