Sikh Scriptures & The Universe, beginning, present and the end

Sri Guru Granth Sahib is the Sikh holy scriptures

How was the world created?
According to Sikhism, God existed all alone in His abstract form - Nirgun - before He created the Universe. This may be called the state of precreation. God was in the state of sunn samadhi or primal void = state of pre-creation, state of contemplation of the void.
According to Guru Nanak, there was darkness and chaos for millions of years. There was only God and nothing else - no mists, no clouds, no vapours, nothing. None existed except God. Guru Nanak says:
"There was darkness for countless years.
There was neither earth nor sky; there was only His Will.
There was neither day nor night, neither sun nor moon.
He (God) was in deep meditation.
There was nothing except Himself." (SGGS p1035)
Guru Amar Das, the third Nanak further clarifies and reinforces this concept in the following lines found in the Guru Granth Sahib:
He created Himself - at that time, there was no other.
He consulted Himself for advice, and what He did came to pass.
At that time, there were no Akaashic Ethers, no nether regions, nor the three worlds.
At that time, only the Formless Lord Himself existed - there was no creation.
As it pleased Him, so did He act; without Him, there was no other. ||1||" (SGGS p509)

Then God willed the creation of the universe. He became manifest: Sargun. He diffused Himself in nature. Guru Nanak says:
"Thou created all Thy Universe to please Thyself, to enjoy the spectacle, the reality, which is the light of Thy own Reality-self."
When was the world created?
This is a mystery. Was this process of creation a sudden and impulsive one or was it one of evolution and slow growth? Only God who created it knows. Like a spider, God spun Himself into a web. A day will come when He will destroy that web once again to become His sole self again.
The holy Granth tells us clearly that the time of the creation of the Universe is beyond human knowledge and that this was not known to the scholars of the Vedas, nor the Qazi who have studied the Koran; in fact this moment cannot be known by mankind. Only the Lord Himself knows about this instant of creation.
"What was that time, and what was that moment? What was that day, and what was that date?
What was that season, and what was that month, when the Universe was created?
The Pandits, the religious scholars, cannot find that time, even if it is written in the Puraanas.
That time is not known to the Qazis, who study the Koran.
The day and the date are not known to the Yogis, nor is the month or the season.
The Creator who created this creation-only He Himself knows." (SGGS p4)

Attributes of His Creation
The Parkriti of three attributes (Rajas, Tamas, Satav) was created by God. Maya, attachment and illusion are also His creation: Guru Gobind Singh, the tenth Sikh Master writes:
"He created the Shakti (power) of three Gunas (attributes)
The great Maya (world illusion) is His shadow."
The Universe is not an illusion. It is reality, not final and permanent but a reality on account of the presence of God in it.
This world is the abode of the Almighty and yet He transcends it.
"You created the vast expanse of the Universe with One Word! Hundreds of thousands of rivers began to flow." (SGGS p3)
"The limits of the created universe cannot be perceived. Its limits here and beyond cannot be perceived. Many struggle to know His limits, but His limits cannot be found. No one can know these limits. The more you say about them, the more there still remains to be said." (SGGS p5)
"So many worlds beyond this world-so very many! What power holds them, and supports their weight?" (SGGS p3)
"All are in the One, and the One is in all. This is what the True Guru has shown me.(5). He who created the worlds, solar systems and galaxies - that God cannot be known.(6). From the lamp of God, the lamp within is lit; the Divine Light illuminates the three worlds.(7)." (SGGS p907)
Beginning of the Universe
"For thirty-six ages, He created the darkness, abiding in the void. There were no Vedas, Puraanas or Shaastras there; only the Lord Himself existed. He Himself sat in the absolute trance, withdrawn from everything. Only He Himself knows His state; He Himself is the unfathomable ocean.(18)" (SGGS p555)
"For so many ages, there was only pitch darkness; the Creator Lord was absorbed in the primal void." (SGGS p1023)
"For endless eons, there was only utter darkness. There was no earth or sky; there was only the infinite Command of His Hukam. There was no day or night, no moon or sun; God sat in primal, profound Samaadhi.(1) There were no sources of creation or powers of speech, no air or water. There was no creation or destruction, no coming or going. There were no continents, nether regions, seven seas, rivers or flowing water.(2)" (SGGS p1035)
"From this primal void, came the moon, the sun and the earth....From this primal void, the earth and the Akaashic Ethers were created....From this primal void, came the four sources of creation, and the power of speech....They were created from the void, and they will merge into the void....." (SGGS p1037)
"The Supreme Creator created the play of Nature; through the Word of His Shabad, He stages His Wondrous Show.(7)....From this primal void, He made both night and day;" (SGGS p1037)
"Creating the Universe, He made the expanse....The True Guru, the Primal Being, is sublime and detached...." (SGGS p1038)

The existing state
"Creating the sun and the moon, He infused His Light into them. He created the night and the day; Wondrous are His miraculous plays." (SGGS p1279)
"Beauty fades away, islands fade away, the sun, moon, stars and sky fade away. The earth, mountains, forests and lands fade away." (SGGS p1354)
"His Power supports the moon, the sun and the stars, and infuses light and breath into the body." (SGGS p1358)
"He established the earth, the sky and the air, the water of the oceans, fire and food. He created the moon, the starts and the sun, night and day and mountains; he blessed the trees with flowers and fruits." (SGGS p1399)
"The continents and the solar systems rest in the support of the One Lord. The Guru has removed the veil of illusion, and shown this to me." (SGGS p205)
"He is the Supreme Lord God, the Perfect Transcendent Lord; O my mind, hold tight to the Support of the One who established the solar systems and galaxies. Chant the Name of that Lord.(1)Pause." (SGGS p209)
"Many millions are the fields of creation and the galaxies. Many millions are the etheric skies and the solar systems....So many times, He has expanded His expansion....Many millions are created in various forms......His limits are not known to anyone." (SGGS p276)

And this is how it will end
"The earth, the Akaashic ethers of the sky, the nether regions of the underworld, the moon and the sun shall pass away." (SGGS p1100)
"Night and day, and the stars in the sky shall vanish. The sun and the moon shall vanish. The mountains, the earth, the water and the air shall pass away. Only the Word of the Holy Saint shall endure." (SGGS p1204)