int buzr
=12;
int dc=13;
void setup() {
  // put your setup code here, to run once:
Serial.begin(9600); 
pinMode(dc, OUTPUT); 
}

void loop() {
 
  // put your main code here, to run repeatedly:
int val=Serial.read(); 
if(val=='1'){
  digitalWrite(dc, HIGH); 
}
else if (val=='0'){
  digitalWrite(buzr,LOW); 
}

}