READ THIS! I'M NOT ADDING SOUND! I said that because I KNOW someone will ask me to. I feel like silence is the key to deep thinking, and I want this to allow for deep thinking. Click the flag, click the space bar to open and close the settings, and move the sliders around to change the tubes. I have seen things like this before and the coding was SO complex, but I made this super easily(90 blocks). I could have made it with less, but the settings required a lot of code. If the tube gets off center, click the stop sign then the flag. If your Wigglyness is set to 0, then the tube will be pretty far to the right.
