The djinn cult is closely knit to the Moroccan Sufi-brotherhoods. With the Gnawa-brotherhood having come as slaves from West Africa to Morocco, the cult combines pre-Islamic narratives with the religious contents of Islam. More than a way to maintain the Gnawa identity, the invocation and worship of djinn in the trance-like derdeba rituals is considered as a way to free the possessed from the impact of the spirits. The Gnawa brotherhood classify djinn into the seven colors. During their invocations they play melodies according to a specific color to bring the djinn to dance. At this time humans may dance with the creatures from another world.