An apparatus for generating a visual representation may include an elongated flexible member adapted to be removably inserted into an enclosure; a dispensing mechanism operable to selectively dispense and retract the elongated flexible member; a counter configured to determine an amount of the elongated flexible member dispensed by the dispensing mechanism; a controller configured to receive the amount of the elongated flexible member dispensed from the counter and determine a rate at which the elongated flexible member is dispensed; and a display in data communication with the controller. The controller causes the rate at which the flexible member is dispensed to be displayed in relation to a visual representation of the enclosure on the display.