Instructions: An LED segment can be toggled on and off by either clicking on the segment or clicking on its corresponding pin.
Pins A through G are represented as checkboxes.
If a pin is checked, then said pin is at a Logic HIGH state. Otherwise, it's at a Logic LOW state.
An active high display will have the LEDs illuminate when their corresponding pins are set to HIGH.
An active low display will have the LEDs illuminate when their corresponding pins are set to LOW.
