It was a Scandinavian artist from Denmark.
Pigment, blinder, and the additives.
Depending on where you are brought up, and the difference in society, you will see different things and people will have different beliefs in symbolism. For example, seeing a bird in a picture for a Christian may represent a dove and be seen as peace, but for someone else it may be seen as a vulture and represent death
Keith Haring chose graffiti for creative expression