What is Lorca's intention of writting this play?

The first inspiration for The House of Bernarda Alba was a woman who lived in one of the villages where Lorca grew up. This woman, whose name was Frasquita Alba, had five unmarried daughters whom Lorca would see walking sadly through the village. But as with all of Lorca's real-life inspirations, his goal was less to reproduce the inspiration than to use it as an archetype and symbol, putting it to use to explore his prevailing themes of repression, sexuality, and tyranny.

http://www.gradesaver.com/the-house-of-bernarda-alba/study-guide/about/