#define LED 2
#define botao 14

int tempo=100;

void setup() {
  pinMode(LED, OUTPUT);
  pinMode(botao, INPUT_PULLUP);
}

void loop() {
  if(digitalRead(botao)) {tempo=100;} else  {tempo=500; }
  digitalWrite(LED, HIGH);
  delay(tempo);
  digitalWrite(LED, LOW);
  delay(tempo);
}