int state = 0; // 0=Stopped, 1=Extended, 2=Retracted

void setup() {
  pinMode(2, INPUT_PULLUP); 
  pinMode(4, OUTPUT);       
  pinMode(5, OUTPUT);       
  
  // SAFE START: Both set to HIGH so the actuator/relays are OFF
  digitalWrite(4, HIGH);
  digitalWrite(5, HIGH);
}

void loop() {
  // Check if button is pressed
  if (digitalRead(2) == LOW) {
    state++; 
    if (state > 2) state = 1; // Cycle: Extend -> Retract -> Extend...

    if (state == 1) {
      digitalWrite(4, LOW);  // Activate Relay 1 (Extend)
      digitalWrite(5, HIGH); // Relay 2 at rest (GND)
    } 
    else if (state == 2) {
      digitalWrite(4, HIGH); // Relay 1 at rest (GND)
      digitalWrite(5, LOW);  // Activate Relay 2 (Retract)
    }
    
    delay(400); // Small delay to prevent bouncing
    while(digitalRead(2) == LOW); // Wait until the user releases the button
  }
}