That seems the best so far. I have some light sensors.

The teacher has an open 150watt incandescent bulb and an extension cord. Hmmmm....

Try again,

The teacher has a portable roadside emergency light. He or she runs around the gym, the toy cars follow. Maybe the gym lights need to be dimmed.

The fact that TOY cars have bang-bang controls ought not to inhibit the PIC control code.

I like it. Why won't it work?

Ken