char data;
int led1=10;
int led2=11;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  pinMode(led1,OUTPUT);
  pinMode(led2,OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  if(Serial.available()>0){
    data=Serial.read();
  }
  if (data==49){
    digitalWrite(led1,HIGH);
    digitalWrite(led2,LOW);
  }
  if (data==50){
    digitalWrite(led2,HIGH);
    digitalWrite(led1,LOW);
  }

}