import time

# Predefined valid RFID tags (for example purposes)
valid_rfid_tags = ["123456A", "654321B", "112233C"]

# Maximum allowed attempts
max_attempts = 3
attempts = 0

# Function to simulate granting access
def grant_access():
    print("Access Granted: Door Unlocked!")
    # Simulate door unlocked for 5 seconds
    time.sleep(5)
    print("Door Locked Again.")

# Function to trigger the alarm after 3 failed attempts
def trigger_alarm():
    print("ALARM: Too many failed attempts! Security Alert!")

while True:
    print("Please scan your RFID tag (Enter your tag ID):")
    scanned_tag = input()  # Simulate RFID input from terminal
    
    if scanned_tag in valid_rfid_tags:
        grant_access()  # Correct tag, grant access
        attempts = 0  # Reset the attempts counter after successful access
    else:
        attempts += 1
        print(f"Access Denied! Attempt {attempts}/{max_attempts}.")
        
        # If attempts exceed the maximum allowed
        if attempts >= max_attempts:
            trigger_alarm()
            break  # End the program or reset based on your requirement
    
    # Add a short delay before next scan
    time.sleep(1)