void setup() {
  // put your setup code here, to run once:
    pinMode(12, INPUT);
    pinMode(13, INPUT);
    pinMode(11, INPUT);
    pinMode(10, INPUT);
    pinMode(07, OUTPUT);
    pinMode(06, OUTPUT);
    pinMode(05, OUTPUT);
  
}

void loop() {
  // put your main code here, to run repeatedly:
  int button1_value = digitalRead(13);
  int button2_value = digitalRead(12);
  int button3_value = digitalRead(11);
  int button4_value = digitalRead(10);
  int bargraph3_value = 0;
  int fade = 5;

  if (button1_value == HIGH)
   { digitalWrite(07, HIGH); }
  else
    { digitalWrite(07, LOW); }

  if (button2_value == HIGH && button3_value == LOW)
    { digitalWrite(06, HIGH);
    delay(500);
    digitalWrite(06, LOW);
    delay(500); }

  else if (button2_value == LOW && button3_value ==HIGH)
   { digitalWrite(06, HIGH);
    delay(1500);
    digitalWrite(06, LOW);
    delay(1500);
   }
  else
   { digitalWrite(06, HIGH);
    delay(1000);
    digitalWrite(06, LOW);
    delay(1000);
   }

   if (button4_value == HIGH)
   { 
    for (bargraph3_value = 0; bargraph3_value >= 254;)
   {
   analogWrite(05, bargraph3_value);
   bargraph3_value = bargraph3_value + fade;
   delay(30);
   }
   for (bargraph3_value = 255; bargraph3_value <= 0;)
   {analogWrite(05, bargraph3_value);
   bargraph3_value = bargraph3_value  - fade;
   delay(30);
  }
  }
}