
    Design a function that calculates the total length of motion-sensing equipment needed for installation along the walls of a square emergency room waiting area, where the equipment must cover the entire perimeter to effectively monitor patient movement and occupancy. The function should take the length of one wall (in meters) as input and determine the complete distance that needs to be equipped with sensors for comprehensive patient tracking.
    

    
def square_perimeter(a):
    """
    Design a function that calculates the total length of motion-sensing equipment needed for installation along the walls of a square emergency room waiting area, where the equipment must cover the entire perimeter to effectively monitor patient movement and occupancy. The function should take the length of one wall (in meters) as input and determine the complete distance that needs to be equipped with sensors for comprehensive patient tracking.
    

    """
def square_perimeter(a):
    """
    Design a function that calculates the total length of motion-sensing equipment needed for installation along the walls of a square emergency room waiting area, where the equipment must cover the entire perimeter to effectively monitor patient movement and occupancy. The function should take the length of one wall (in meters) as input and determine the complete distance that needs to be equipped with sensors for comprehensive patient tracking.
    

    """
    perimeter = 4 * a
    return perimeter