Revelation 6:12-14 (KJV)
12 And I beheld when he had opened the sixth seal, and, lo, there was a great earthquake; and the sun became black as sackcloth of hair, and the moon became as blood;
13 And the stars of heaven fell unto the earth, even as a fig tree casteth her untimely figs, when she is shaken of a mighty wind.
14 And the heaven departed as a scroll when it is rolled together; and every mountain and island were moved out of their places.
Joseph Smith Changed The Bible: Revelation 6:14
Joseph Smith purposely changed the Bible, including the Book of Revelation. An example is Revelation 6:14.