So here is a transistor made out of a resistor.
It has a weakness that the more amplification you want, the more load you have to put on the motor. And the resistance of the load has to be in multiples of the resistance of the motor.
Plus it requires you to match the volts of the signal to the voltage reduction of the voltage divider, so your going to have to get the volts right going into it, then it works really good after that.
So you hold the capacitor open, (and it only takes 1 volt to do it because of the division.) and the motor will turn off, if you let the capacitor close, the current will divert through the motor, and the voltage division will be cancelled, to be the full voltage of the battery.
What do you guys think of this?