bool button = 0;
bool statusLED = 0;

void setup() {
  // put your setup code here, to run once:
pinMode(25, INPUT_PULLUP);
pinMode(26, OUTPUT);

}

void loop() {
  // put your main code here, to run repeatedly:
button = digitalRead(25);
if(button ==0){
  if(statusLED ==0){
    statusLED = 1;
  }else{
    statusLED = 0;
  }
}
digitalWrite(26, statusLED);
delay(500);
}