It takes just a signal or one word and everything, great or tiny, is done. In fact there is nothing to distinguish great from tiny; it is all part of how human beings see things. Nor is there a question of time, not even the twinkling of an eye; it is merely a metaphor to help people understand. Time is no more than a human conception that arises from the position of the earth and its rotation. As far as God and His plans are concerned, it has no significance.
The command is given just once and this entire universe comes into existence. Similarly, any change in it can be accomplished. Just one command and it will all go away as God wishes. In everything, the command is given once only: bringing anyone into life, taking it here or there, causing it to die, bringing it back in some shape or form, resurrecting all creatures from all generations to gather them for the reckoning and reward. It is a once only command that requires no effort or time, because it comes from the Almighty in due measure and with perfect ease.
"In the Shade of the Quran" - Sayyid Qutb, Vol 16, p. 271