Arduino Program

int incomingByte = 0;   // for incoming serial data
int led=10;
int led1=12;
void setup() {
        Serial.begin(9600);     // opens serial port, sets data rate to 9600 bps
 
}


void loop() {

        // send data only when you receive data:
        if (Serial.available() > 0) {
                // read the incoming byte:
                incomingByte = Serial.read();
if(incomingByte==0)
{
  digitalWrite(led,HIGH);
  
  
 
}
else if(incomingByte==1)
{
    digitalWrite(led1,HIGH);
    

}
else if(incomingByte==2)
{
  digitalWrite(led,LOW);
  

}
else if(incomingByte==3)
{
  digitalWrite(led1,LOW);
  

}
                // say what you got:
                Serial.print("I received: ");
                Serial.println(incomingByte, DEC);
        }
}