Thousands of years ago, in the hot and humid virgin forests of Africa, the indigenous people used fire to sing freely and enthusiastically while following various complicated rhythms. This kind of singing may not be considered by some "civilized people". Music. However, such a sound is the most primitive, the sound of life issued by a tenacious instinct in a harsh environment. If blues music is the root of many musics, then the above is the root of this source. This text is the introduction of an article. What should the article tell next? ['Human instincts in primitive music.', 'Origin and relationship between blues music and indigenous music.', 'Historical background of indigenous music.', 'Relationship between natural environment and music style.']