This was inspired by the octospiders in the Rama series by Arthur C. Clarke. Reading the series is not a requirement for solving the puzzle and actually wouldn't help at all besides being able to say, "I recognize that."
Nicole des Jardins comes across a subspecies from the octospiders' home planet. Although it uses color bands to communicate just like the octospiders, the language is completely different. As she's puzzling over the creature and trying to understand, Dr. Blue approaches.
"Do you understand?" he asks.
"Not yet," replies Nicole, "but I'm not one to give up easily."
"If I may offer some guidance..." the doctor begins, waiting for Nicole to respond in the affirmative before continuing, "This is a species we engineered using communication systems recovered from the communication equipment humans left on Rama. Although it uses color bands so we can understand, it speaks in a language best understood by your own computers and bears no resemblance to our own language or grammar. With a little translation help of any of your computers, a human should have no trouble reading it."
"I thought about that but all I got was gibberish - mostly just parentheses, actually."
"How many legs does an octospider have, Nicole?"
"Oh, right. Hang on, then." Nicole makes a few alterations on her pocket computer's program. When the result is displayed, she looks up at Dr. Blue. "I see you've been watching ancient Earth movies again."
The series of color bands that the little creature was displaying are shown below in the order they appeared. Can you figure out what it was saying to Nicole?