void setup(){
   pinMode(12, OUTPUT);
   pinMode(11, OUTPUT);
   pinMode(2, INPUT_PULLUP);
   pinMode(3, INPUT_PULLUP);
 }

 void loop(){
   boolean button1 = digitalRead(2);
   boolean button2 = digitalRead(3);
   if (!button1){
     digitalWrite(12, HIGH);
     delay(200);
     digitalWrite(12, LOW);
     delay(200);
   }
   if(!button2){
     digitalWrite(11, HIGH);
     delay(200);
     digitalWrite(11, LOW);
     delay(200);
   }
 }