Day 4: Sloth

<sarcasm> Well, I accomplished so much! I... I... I added a new block type! Yeah! One new block type in just 24 hours. That's insane! Look at how productive I am! </sarcasm>

(On a side note, it appears HTML no longer supports the sarcasm tag.)
So, I got nothing done. I'm in the same boat as Harrison going into Day 5, so hopefully over the weekend we both experience giant bursts of productivity. No pitchforks, please.