The Brief

Build me a working traffic light. Red, then green, then
amber, then round again, on its own, at a sensible speed.

Write your requirements list before you write any code. What the player does, what happens on screen, and every question the brief did not answer.

Notes

• You drew this at session 2. Now one of the three is lit and the other two are dark.
• Something has to remember which light is on, and something has to count time. Both live above love.draw.
• A timer is a variable that dt is added to. When it passes a threshold, act and reset it — reset it, do not set it to zero and forget.
• Amber is shorter than the other two. The brief does not say how much. Decide.

What Success Looks Like

• The three lights cycle on their own with no key presses
• Exactly one is lit at any moment
• The cycle repeats forever without drifting or sticking
• Changing one variable changes how fast the whole thing runs

Test it by leaving it running for two minutes. A timer that is reset wrongly drifts, and two minutes is enough to see it.

Submit

Your requirements list and your program folder, named cc-traffic-light.