danherrera

        // Within onViewCreated 
        fun updateViewBasedOnPin(pin: String) {
            binding.digit1.text = pin.getOrNull(0)?.toString()
            binding.digit2.text = pin.getOrNull(1)?.toString()
            binding.digit3.text = pin.getOrNull(2)?.toString()
            binding.digit4.text = pin.getOrNull(3)?.toString()
            binding.digit1Underline.setBackgroundColor(if (pin.isNotEmpty()) Color.YELLOW else Color.DKGRAY)
            binding.digit2Underline.setBackgroundColor(if (pin.length > 1) Color.YELLOW else Color.DKGRAY)
            binding.digit3Underline.setBackgroundColor(if (pin.length > 2) Color.YELLOW else Color.DKGRAY)
            binding.digit4Underline.setBackgroundColor(if (pin.length > 3) Color.YELLOW else Color.DKGRAY)