Matthew 27:45-54 and Mark 15: 33-41 Talks about the Friday that Jesus was crucified and the darkness that came upon the earth. It gets dark at noon and then Jesus dies at 3PM, and there is a huge earthquake. The sun goes out for 3 days. And then angels come down from Heaven and tell some women (I think Martha and Mary but don't quote me on that) to go and tell what happened. Then the sun appears again after the 3 days.

In Acts 2:20 it is written that in the last days the sun shall turn black as sackcloth and the moon shall turn to blood before the return of the Lord. This is the beginning of the Great Tribulation. It doesn't say for sure how this will happen, but we believe that a great Nuclear War will begin blocking out our sun and moon for many months or possibly years. Once the sky is cleared from the debris of dust and silt, the sun will once again appear.

Then read Revelation 6:12 and read what it says. Then again in Amos 8:9 it reads that on the day of the Lord the sky will be darkened at noon plunging earth into complete darkness. This will be when God pours out his wrath upon the nations who rebelled against him.

Hope this helps. However, I have not read anything in the bible pertaining to us anointing our windows and doors with oil and blacking out our houses. This could be a prophecy from someone else or I have missed something dire in the Bible.