This project was challenging in several ways. The main problem I ran into was using the correct LEDs. Some LED drew too much or too little current to work with the resistor set up. The blue LEDs seemed to be the only ones that worked. Another challenge I ran in to was the order of the resistors and the LED wiring in orientation to the buttons. if the LED wiring was placed closer to the button than the resistor the circuit wouldn't work. The Resistor needed to be closer to the button to work.