Intro: (FM) is the encoding of information in a carrier wave by varying the instantaneous frequency of the wave. This contrasts with amplitude modulation, in which the amplitude of the carrier wave varies, while the frequency remains constant. wikipedia
Many thanks to Richard McWhorter (AllAmericanFiveRadio) for the idea and circuit diagram.
In my setup I biased the transistor in a different way. I used 3.5 volts to power the circuit.