Here we have the truth table that we created to show what lights need to turn on when.
Above is the schematics separated by light. The first one is for the alarm, the second one is for the red light, the third one is for the yellow light, and the last one is for the green light.
Here are the schematics of all of the lights put together in one circuit. The top is the alarm, the second one is the red light, the third one is the green light, and the last one is the yellow light.