const int RELAY = 26;
const int BUTTON = 17;
void setup() {
 Serial.begin(9600);
 pinMode(RELAY,OUTPUT);
 pinMode(BUTTON, INPUT_PULLUP);
 digitalWrite(RELAY,HIGH);
}

void loop() {
  if(digitalRead(BUTTON)==HIGH){
    digitalWrite(RELAY,HIGH);
    Serial.println("ON");
  }
  else
  {
    digitalWrite(RELAY,LOW);
    Serial.println("OFF");
  }

}