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This article is about the p4 oscillator sometimes referred to as "cloverleaf". For other uses of "cloverleaf", see Cloverleaf (disambiguation).
Achim's p4 is about the twenty-third most common naturally-occurring oscillator in Achim Flammenkamp's census.[2] On Catagolue, it is the third most common period 4 oscillator, being less common than mazing.[3]Stator variants with one[4] and three[5] bits added respectively are the fourth and eighth most common period-4 oscillators,[3] and an inflected version has also occurred naturally.[6]
x = 15, y = 7, rule = LifeHistory
6.3A2$4.A5.A2.2A$D3.A5.A2.2A$4.A5.A2$6.3A! [[ THUMBSIZE 2 GPS 6 GRID THEME Book AUTOSTART T 0 PAUSE 2 PASTET 23 PASTE C! 0 3 T 23 PAUSE 1 T 45 PAUSE 1 LOOP 55 ]]
#C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]]
Achim's p4 forms when a traffic light + block sequence gets hit by a dot spark in a specific location and timing. (click above to open LifeViewer)
One half of Achim's p4 (excluding the central row) may act as the stator component of a seminaturally-occurring variant of the T-nosed p4, or as part of the stator of a half-middleweight volcano, as found by Noam Elkies on March 15, 2000.