When I first Listen to the Rock Genre

Before when i was listening to Rock i used to listen to Hip Hop/Rap like about 2 Years before 2004 and then in that year one day when i was at a friends house in east-side of the town then when we were finish playing playing video game we started to listen to my friends music and i had no idea that to listen to rock and it was the band green day that we listen too then my 1st impression of that band sounded really cool that i said to myself i should listen to this kind of music