unsigned long t=0;
unsigned long t2=0;
void setup() {
  // put your setup code here, to run once:
pinMode(13, OUTPUT);
pinMode(11, OUTPUT);
pinMode(2, INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:

if(millis()-t>1000){
  t=millis();
  digitalWrite(13,!digitalRead(13));
}

if(millis()-t2>1500){
  t2=millis();
  digitalWrite(11,!digitalRead(11));
}

}