#define RELAY 0
#define PUSH 1
void setup() {
  // put your setup code here, to run once:
 pinMode(RELAY, OUTPUT);
pinMode(PUSH, INPUT);

}


void loop() {
  // put your main code here, to run repeatedly:
if (digitalRead(PUSH) == 0){
  digitalWrite(RELAY, HIGH);
  delay(500);
}else{
  digitalWrite(RELAY, LOW);
  delay(500);
  delay(1); // this speeds up the simulation
}

}