void setup() {
pinMode(13,OUTPUT); 
pinMode(12,OUTPUT); 
pinMode(10,INPUT); 
}
void loop() {
if(digitalRead(10)==0){

digitalWrite(13,HIGH);
delay(500);
digitalWrite(13,LOW); delay(100);
}

else 
{
digitalWrite(12,HIGH);
delay(500);
digitalWrite(12,LOW); 
delay(500);
}
}