
    Design a function that calculates the total monitoring boundary length for a bank's square-shaped security zone, where the security zone's side length is provided in meters. The calculated perimeter represents the critical boundary where the fraud detection system actively monitors transaction patterns and customer behavior around ATM locations or bank branches.
    

    
def square_perimeter(a):
    """
    Design a function that calculates the total monitoring boundary length for a bank's square-shaped security zone, where the security zone's side length is provided in meters. The calculated perimeter represents the critical boundary where the fraud detection system actively monitors transaction patterns and customer behavior around ATM locations or bank branches.
    

    """
def square_perimeter(a):
    """
    Design a function that calculates the total monitoring boundary length for a bank's square-shaped security zone, where the security zone's side length is provided in meters. The calculated perimeter represents the critical boundary where the fraud detection system actively monitors transaction patterns and customer behavior around ATM locations or bank branches.
    

    """
    perimeter = 4 * a
    return perimeter