bool btnOnOff=0;
bool _btnOnOff=0;
bool led=0;
bool rl1=0;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(4,INPUT);
  pinMode (2,OUTPUT);
  digitalWrite(2,HIGH);
  pinMode (12,OUTPUT);
  digitalWrite(12,HIGH);
  pinMode (27,OUTPUT);
  digitalWrite(27,HIGH);
  pinMode (26,OUTPUT);
  digitalWrite(26,HIGH);
}

void loop() {
  btnOnOff=digitalRead(4);
  if(btnOnOff==1 && _btnOnOff==0) 
  {
    _btnOnOff=1;
    led=!led;
    digitalWrite(2,led);
    digitalWrite(12,led);
    digitalWrite(27,led);
    digitalWrite(26,led);
   
  }
  if(btnOnOff==0 &&  _btnOnOff==1) _btnOnOff=0;
}