int pinC = 17;
void showAll(){
digitalWrite(pinC,1);
}
void showOFF(){
digitalWrite(pinC, 0);
}
void showC(){
digitalRead(pinC, 1);
}
void setup(){
pinMode(pinC, OUTPUT);
}
void loop(){
showAll();
delay(500);
showOFF();
delay(500);
showAll();
delay(500);
showOFF();
delay(500);
showAll();
delay(500);
showOFF();
delay(500);
showAll();
delay(500);
showOFF();
delay(500);
}