FIRST AND SECOND ENDING

First ending: When you repeat a part of the song sometimes you just change the ending of the melody, let's say you have a song with 8 measures and the first 6 measures are exactly the same, so you put the repeat sign at the end of the 8th measure, and put the first ending on top of measure 6 and 7, so you repeat measures 1 to 6 the same and go to the second ending.