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|Number of cells||145|
|Discovered by||Noam Elkies|
|Year of discovery||1995|
It works by using sparks from three period 4 middleweight emulators and the period 5 middleweight volcano to hassle a traffic light predecessor. The middleweight emulator on the left can be replaced with a middleweight volcano.
- A nontrivial period-20 oscillator, such as heavyweight emulator on octagon II, could have been constructed from two oscillators of lower period (such as p4 and p5), both of which were known by an earlier date. However, no such LCM oscillators were attested prior to the discovery of this oscillator in 1995.