for my state machine, I created something which would help me in my final term project. It is very simple but i managed to take in 3 different inputs (light, temp & play) and then determine what they would output. There are 3 basic states visualized, Decreasing, Increasing and Equilibrium.

int Light = 0; //light intensity
int Temp = 0;  //temperature level
int Switch = 0;//current Switch state
int Switch2 = 0;// Previous switch state
int State = 0;  //Play or not Play
int PlayCount = 0; //Amount of Play
int LightCount = 0; //Amount of Light
int TempCount = 0; //Amount of Temperature
int Emotion = 0; //Current Amount of Emotion
int Emotion2 = 0;//Previous amount of Emotion

void setup() {

  pinMode(2, INPUT);
  pinMode(8, OUTPUT);
  pinMode(9,OUTPUT);
  pinMode(10, OUTPUT);

  Serial.begin(9600);          

 }

void loop(){

  Light = analogRead(5);
  Temp = analogRead(4);
  Switch2 = Switch;        //Assigning past value
  Switch = digitalRead(2); //Assigning new value

  if(Switch != Switch2 && Switch == HIGH){ //Determining & Assigning new switch state
   if(State == 1){
     State = 0;}
     else State = 1;
  } 

  if(State == 1){         //Accumulating Play
    digitalWrite(8,HIGH);
    PlayCount++;
  }
  else {PlayCount = PlayCount - 1; // Reducing Play
  digitalWrite(8,LOW);
  }

  if(Light > 512)  //Accumulating Light
  {
    LightCount++;
  }else LightCount = LightCount - 1; // Reducing Light

  if(Temp > 512) //Accumulating Temp
  {
    TempCount++;
  }
  else TempCount = TempCount - 1; //Reducing Temp

  Emotion2 = Emotion; //Previous emotion value
  Emotion = LightCount/2 + TempCount/2 + PlayCount; //Current Emotion value

  if(Emotion > Emotion2){
    digitalWrite(10,HIGH);
    digitalWrite(9,LOW);
    Serial.println("Increasing");
  }
  if(Emotion < Emotion2){
    digitalWrite(9,HIGH);
    digitalWrite(10,LOW);
    Serial.println("Decreasing");
  }
  if(Emotion == Emotion2){
    digitalWrite(9,HIGH);
    digitalWrite(10,HIGH);
    Serial.println("Equilibrium");
  }

  //Serial.print(LightCount/10);
  //Serial.print(":");
  //Serial.print(TempCount/10);
  //Serial.print(":");
  //Serial.println(PlayCount/10);

}