Creation By Brahma.

Brahma broken down the egg into two parts. From one part of the egg He created Dyulok (Heavenly abode), and from another part He created Earthly abode and He made The Sky, The Eight Directions and  the place for eternal Water in between the Heavenly and Earthly abodes. Manu Smiriti 1/15
Brahma created the decisive and indecisive mind from His own nature and from The Mind He created the feeling or sense of the Self. Manu Smiriti 1/16

Birth Of Brahma.

Water is known as "Naar", because it is born out of "Nar" (Man), that is why the one that's born early is known as Narayan. Manu Smiriti 1/12
In fact the creator of the universe Parmatma remains invisible in this world.  The main base of eternal and true and false basic nature is known as Braham when He is along with  nature. Manu Smiriti 1/13
Brahma is born out of Braham, that's why named Brahma.
Brahma after living in the egg for one year ,  broken the egg with His power of contemplation. Manu Smiriti 1/14
One year of Brahma is equal to 31,10,40,00,00,000 human years.

Creation Of Brahmand And Brahma.

That implanted seed took the form of a bright egg that enlightened with a luster of thousands of Suns. After that Brahma born out from the same egg who been the creator of all the worlds. Manu Smiriti 1/11
Thus the whole universe developed by the seed that God Parmatma implanted into nature. Therefore it is evident that God Parmatma were present before the creation, is present in the middle or at present and will be present on the end of the creation. The Brahma has born from the same God Parmatma. He merely is the cause, doer and deed as well.