Add all new levels

levels/intro/motivation

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+[description]
+
+So you've been working on an essay about goldfish. You can look at the backup copies you made by clicking on them!
+
+But look - something went wrong in the latest version of the file! Maybe it has been infected with a vowel-eating virus?
+
+Make a new version (with the number 5) from the last version that's still okay, and add at least two more lines to it!
+
+[congrats]
+
+Good that you had that backup, huh?
+
+But you're a bit worried that two weeks from now, you'll have hundreds of copies of your essay, and it will be hard to keep track of all of them.
+
+And especially when working with other people, sending backup copies around doesn't seem ideal.
+
+Let's look at another way to do this. :) Click "Next Level" as soon as you're ready!
+
+[setup]
+
+rm -rf .git
+
+echo "~ Why goldfish are the best pets ~
+
+(I still need to write this.)" >> essay_1.txt
+
+
+echo "~ Why goldfish are the best pets ~
+
+- They don't make any noise.
+- They are pretty. (I should probably put this higher in the list?)" >> essay_2.txt
+
+
+echo "~ Why goldfish are the best pets ~
+
+- They are pretty.
+- They don't pee on the carpet.
+- They don't make any noise." >> essay_3.txt
+
+echo "~ Why gldfsh r th bst pts ~
+
+- Thy r prtty.
+- Thy dn't p n th crpt.
+- Thy dn't mk ny ns." >> essay_4.txt
+
+[win]
+
+test "$(cat *5.txt | wc -l )" -ge 7 && grep carpet *5.txt