I am building my own Scalextric Digital racetrack which can be hoisted up under the ceiling.

My plan is to make natural scenery with buildings, mountains, lights all over the track

Lights must be controlled as IoT with wifi so it can be controlled, turn on/off via an app and must work with Google Assistant so the light can be turned on and off with voice control
I'm in Midtjydsk Miniracing Klub, where we race for "fun" and build a huge track

I build in sensor there turn the green light or red light in the track

When one of the cars on track 1 or 2 pass

•  sensor 1 or 2, Turn on the green light

• Sensor 4 and 5 turns on the red light and turn off the green light

• Sensor 6 turn on the green light when a car leaves the pitstop

• Sensor 7 and 8 turns all light off