Cave Johnson here, and welcome to Aperature Rituals. Associate Pluviculurists, Astrologers, Farmers, you're here because I'm damn sick of this drought and nobody had any better ideas. Greg is telling me that when there's no rain, there's no deadly goo; now if you punch that into your calculator that makes a sad face. So, here we've got an elaborate and potentially life threatening raindance that should hopefully bring a fresh downpour of biohazardous waste. It's hit-or-miss with these things, but hey, it's worth a shot. I let this rookie, Squip, take over the operation on this one, I don't think he's ever made anything before, but don't worry, you're in good hands. All right now, what are you waiting for? You don't get paid to sit around and look handsome, that's my job.

I'd call this medium-hard puzzle. I'd love to hear your comments and suggestions!
Solution here: http://youtu.be/8qCxqVqM58I

File Name: Sp_RainDance.zip
File Size: 2.93 MiB
Click here to download RainDance