as I see it, you can change the color of the first mannequin and you have to change the colors in order, but if you mess up, you can start over, this is my tip, but I haven't managed to get myself to try it yet to see if my theory is correct
There's 7 mannequins hidden around, each corresponding to one of the 7 nurses and you have to interact with them in a certain order to get them all to light up
