int start = 2;
int pause = 3; // input
int stop = 4;

int led1 = 5;
int led2 = 6; //output
int led3 = 7;

void setup() {
  pinMode(start, INPUT_PULLUP);
  pinMode(pause, INPUT_PULLUP);
  pinMode(stop, INPUT_PULLUP);

  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);

  digitalWrite(led1, LOW);
  digitalWrite(led2, LOW);
  digitalWrite(led3, LOW);

  Serial.begin(9600);

}

void loop() 
{
  if (digitalRead(start) == LOW && digitalRead(pause) == HIGH)
  {
    digitalWrite(led1, HIGH);
    digitalWrite(led2, LOW);
    digitalWrite(led3, LOW);
    Serial.println("Blending Start");
    delay(100);
  }

  if (digitalRead(pause) == LOW && digitalRead(start) == HIGH)
  {
    digitalWrite(led1, LOW);
    digitalWrite(led2, HIGH);
    digitalWrite(led3, LOW);
    Serial.println("Blending PAUSED");
    delay(100);
  }
  
  if (digitalRead(stop) == LOW && digitalRead(start) == HIGH && digitalRead(pause) == HIGH)
  {
    digitalWrite(led1, LOW);
    digitalWrite(led2, LOW);
    digitalWrite(led3, HIGH);
    Serial.println("Blending Stopped");
    delay(100);
  }
  else
  {
    digitalWrite(led3, LOW);
  }
}