Click the green flag to begin. Watch the fish swim around! If you turn on video motion, you can make frantic movements to scare the koi xD Yeah, that's it :| For those of you who want to know how to turn on video motion, click inside the project, and under the "sensing" section, there will be a block called "turn video on". Click this, and your browser may ask if you want to turn on your camera. Then click "allow" :)