Black butterfly

I wonder why this black butterfly stands above my hand, I think with the appearance of the black butterfly is mystical, or the black butterfly is only lonely without a friend and then approached me, not long afterwards, the black butter flew again.

One a day, I went to the garden, the garden is not far from where I live, about 100 meters away, my goal is to clear the garden so I can grow crops. When I arrived at the garden, suddenly there was a black butterfly flying again around my sight, after which the butterfly came and stood on my hands.

Not long after that the black butterfly stood on my arm, then the butterfly flew away and left me, I became confused with the black butterfly, then the question arose from me whether the arrival of the black butterfly is a sign good or bad for me? how do you think of a black butterfly?