This exercise is based around the Beatles' song Yesterday, and the evolution of its lyrics over time.

• Clone the repo I've created for you, using the following command (make sure you're not already in a repo when you run it!)

git clone <https://github.com/Colt/yesterday-exercise>

• Change into the newly created directory. You should see a file called lyrics.txt

• Take a look at the commit history. You should see 8 commits on the master branch.

• Go "back in time" by checking out the very first commit. Remember, this puts you in detached HEAD. Take a look at the lyrics.txt file to verify things have changed. Then, leave detached HEAD by returning to the master branch.

• Go back to the commit where the original version of the lyrics was completed. The commit has the message "finish original lyrics". Create a new branch called scrambled-eggs based upon this commit.

• Go back to the master branch

• Delete everything in the lyrics.txt file. Save the file.

• Oh no, that was a mistake! USING A GIT COMMAND, discard the changes you made to lyrics.txt since the last commit. We saw a couple of ways of achieving this.

• Suddenly you get a creative itch! You want to write your own parody lyrics! Replace the contents of lyrics.txt with the following lyrics (from this website)

  404
  Guess this ain't the page you're looking for
  On this website there are thousands more
  With no error 404
  
  Suddenly
  This is not the page you thought you'd see
  But it's not an error 403
  Yes, 404s come easily
  

• Add and commit the changes on the master branch

• Add this to the bottom of the lyrics.txt file:

  Why it has to show, I don't know
  Or what it's for
  You typed something wrong?
  Here's no song - it's 404
  
  404
  Adding 1% to twenty score
  (I put that line in 'cause it scans, no more)
  "Goodbye" from error 404
  

• Add and commit the changes to the master branch

• After more consideration, you realize that you actually don't want the previous two commits (the 404 parody lyrics) on the master branch. You want to move them to a new branch!

• Use a git command to "undo" the prior two commits on master. Make sure you KEEP THE CHANGES IN YOUR WORKING DIRECTORY. Just undo the two git commits. Your lyrics.txt file should still contain the 404 lyrics.

• Create a new branch called 404, switch to it, and add and commit the 404 lyrics in your working directory.

• Switch back to master and make sure lyrics.txt contains the actual lyrics to Yesterday