Help Sir Fluffington, the dramatic cat, complete his evening diary entry by dragging the correctly punctuated words into the blanks.

When the sun finally goes down, I begin my nightly routine. I will first sprint down the hallway, and then I will loudly demand a second dinner.

When the sun finally goes down, I begin my nightly routine.

Use a comma after an introductory dependent clause (like "When the sun finally goes down") to separate it from the main sentence.

I will first sprint down the hallway, and then I will loudly demand a second dinner.

Use a comma before a coordinating conjunction ("and," "but," "so") when it connects two complete, independent sentences.