
    Calculate the total length of pressure-sensitive mats needed to create a continuous fall detection barrier around a patient's designated safe movement zone, where the safe zone is marked as a square area with a given side length in meters. The perimeter measurement will determine the exact amount of sensor strips required for complete coverage of the monitored boundary.
    

    
def square_perimeter(a):
    """
    Calculate the total length of pressure-sensitive mats needed to create a continuous fall detection barrier around a patient's designated safe movement zone, where the safe zone is marked as a square area with a given side length in meters. The perimeter measurement will determine the exact amount of sensor strips required for complete coverage of the monitored boundary.
    

    """
def square_perimeter(a):
    """
    Calculate the total length of pressure-sensitive mats needed to create a continuous fall detection barrier around a patient's designated safe movement zone, where the safe zone is marked as a square area with a given side length in meters. The perimeter measurement will determine the exact amount of sensor strips required for complete coverage of the monitored boundary.
    

    """
    perimeter = 4 * a
    return perimeter