const int pinrelay = 1;
const int pinpb = 2;
void setup() {
  // put your setup code here, to run once:
pinMode(pinrelay, OUTPUT);
pinMode(pinpb, INPUT);
}

void loop() {
  if (digitalRead(pinpb) == HIGH) {
  digitalWrite(pinrelay, HIGH);
  delay(100);
} else {
  digitalWrite(pinrelay, LOW);
  delay(100);
 } // put your main code here, to run repeatedly:

}