Implement a 4-bit counter using the LEDs (You do not need the switches for this exercise). The count value should update approximately every 1 second. Use the BTN0 and BTN1 push buttons on the ZYBO Z7-10 board to control the direction of the count. For example, when the BTN0 button is pressed, the counter should count up. Likewise when the button BTN1 is pressed, the counter should count down. When neither button is pressed, the count should remain the same. Demonstrate this operation to the TA upon completion.