
    Design a function to calculate the total length of sensor coverage needed for the emergency room waiting area by determining the perimeter where motion-tracking sensors must be installed, given the length of one wall of the square-shaped room. The calculated perimeter will ensure continuous patient monitoring and help optimize patient flow management in the emergency department.
    

    
def square_perimeter(a):
    """
    Design a function to calculate the total length of sensor coverage needed for the emergency room waiting area by determining the perimeter where motion-tracking sensors must be installed, given the length of one wall of the square-shaped room. The calculated perimeter will ensure continuous patient monitoring and help optimize patient flow management in the emergency department.
    

    """
def square_perimeter(a):
    """
    Design a function to calculate the total length of sensor coverage needed for the emergency room waiting area by determining the perimeter where motion-tracking sensors must be installed, given the length of one wall of the square-shaped room. The calculated perimeter will ensure continuous patient monitoring and help optimize patient flow management in the emergency department.
    

    """
    perimeter = 4 * a
    return perimeter