This five tones chosen by John Williams after trying about 350 of the thousands of five-note possible combinations mean the most recognizable feature of his score for Close Encounters of the Third Kind. Here, under the color light screen that displayed the conversation with the aliens and over the Curwen hand signals also used in the intercivilizational dialogue.
You ain’t ever been on no bug hunt like this. Ninety per-cent of your squad is wiped out by a hive of hideous xenomorphs that you don’t dare kill. Med lab in the main structure won’t hold for long – those pesky xenomorphs are pretty friggin’ smart. They’ll get in there somehow. They’ll get in there and use your body as a host for their momma’s bubs. But in this situation, with certain death a reality, it’s best to stay frosty.