Caballucos del Diablu[1] (Cantabrian: (little) horses of the devil) is a Cantabrian myth, a legend from the Cantabria region of northern Spain.
It originates at the St John's Eve. When the people make fire to purify their souls, appears giant dragonflies between the ashes with the souls of sinners, and come to discharge the fury of all a year of sins with fire and terrifying screams.
The red one was a man who lent money to farmers and then using dirty tricks to stole their properties; the white was a miller who stole many mill of his master; the black was a hermit who played tricks on the people; the yellow one corrupt judge; the blue an innkeeper and the orange a child who abused their parents.[1]