Internet of things

#include <SoftwareSerial.h>
SoftwareSerial BT(0,1);
#define redPin 13
#define greenPin 12
#define bluePin 11
void setup()
{
 //Serial setup
 Serial.begin(9600);
 
 BT.begin(9600);

 pinMode(4, OUTPUT);
 digitalWrite(4,HIGH);
 pinMode(redPin, OUTPUT);
 pinMode(greenPin, OUTPUT);
 pinMode(bluePin, OUTPUT);
 setColor(255, 0, 0);
 delay(500);
 setColor(0, 255, 0);
 delay(500);
 setColor(0, 0, 255);
 delay(500);
 setColor(255, 255, 255);
}
void loop()
{
 while (BT.available() > 0)
 {
   int redInt = BLU.parseInt();
   int greenInt = BLU.parseInt();
   int blueInt = BLU.parseInt();
   redInt = constrain(redInt, 0, 255);
   greenInt = constrain(greenInt, 0, 255);
   blueInt = constrain(blueInt, 0, 255);
   if (BT.available() > 0)
   {
     setColor(redInt, greenInt, blueInt);
     Serial.print("Red: ");
     Serial.print(redInt);
     Serial.print(" Green: ");
     Serial.print(greenInt);
     Serial.print(" Blue: ");
     Serial.print(blueInt);
     Serial.println();
     BT.flush();
   }
 }
}
void setColor(int red, int green, int blue)
{
 analogWrite(redPin, red);
 analogWrite(greenPin, green);
 analogWrite(bluePin, blue);
}