You weren't sure. you looked inside the tube to see if you could figure something out. the girl said "Hey I found some sort of control panel." then the entry into the tube you came into closed.
You asked "What the heck did you do?!?"
She said "I just pressed one button hoping it would say what the machine was supposed to do. Let's see it says removing clothing..." A mist appeared in the tube and then dissipated showing your naked body. The girl looking said "looks like your privates are pixilated from outside the tube. Either way it's telling me to go with a program and then it'll let you out."
You asked "Are they labeled?"
She said "Nope just 1, 2, 3, 4, 5, 6, 7, 8, 9, etc. Which one should I press?"
You sighed and said "May as well start with the first one."
She pressed the first button and an energy seemed to fill the chamber as your chest started to tingle. You saw your nipples elongate as flesh piled up underneath. You saw that you grew breasts that were about a b-cup. the girl smiled and said "your nipples are now pixilated. Do you want out or should I try another button and see if that helps?"