p156 Hans Leo hassler

P156 Hans Leo hassler[note 1] is a period-156 traffic light hassler discovered by Noam Elkies on January 4, 1995,[1] and was the first period 156 oscillator to be found. It features two crowns turning a traffic light into a B-heptomino, and two eater 1s that then turn the B-heptomino back into a traffic light.

p156 Hans Leo hassler
<html><div class="rle"><div class="codebox"><div style="display:none;"><code></html>x = 33, y = 40, rule = B3/S23 15b2o4b2o4b2o$14bo2bobo4bobo2bo$14b3o10b3o$17b2o6b2o$16bo2b6o2bo$16b2o 8b2o2$13bo$8b4o3bo11bo$11bo3bo4bo4bo3b4o$15bo3b3o3bo3bo$12bo12bo$13b2o 13bo$26b2o2$30b2o$30bo$28bobo$28b2o$13b3o$13bobo$3b2o8b3o$2bobo$2bo$b 2o2$5b2o$4bo7bo5b2o$7bo3b3o6bo$3bo3bo2b5o2bo$4o3bo2b5o2bo3bo$5bo6bo4bo 3b4o$19bo$10b2o$5b2obo4bob2o$5bo10bo$6b2o6b2o$3b3o2b6o2b3o$3bo2bo8bo2b o$4b2o10b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] <nowiki>#C [[ GPS 13 ZOOM 6 LOOP 156 ]]</nowiki> <html></code></div></div><canvas width="200" height="300" style="margin-left:1px;"><noscript></html> <html></noscript></canvas></div></html>
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Pattern type Oscillator
Number of cells 157
Bounding box 33×40
Period 156
Mod 78
Heat 130.3
Volatility 0.84
Strict volatility 0.39
Discovered by Noam Elkies
Year of discovery 1995

Elkies also found that the oscillator has several simple variants with an alternative phase of one of the crowns, leading to a period 144 version. It can even be made to be period 96 with figure eights, or period 132 with two copies of unix.

On November 10, 2019, Entity Valkyrie found a period 288 version of this oscillator.[2]

A period 132 version of the Hans Leo hassler
Download RLE: click here
A period 144 version of the Hans Leo hassler
RLE: here
gollark: My nice small alpine system is being bloated with a million header files.
gollark: Python Package Management Being Evil #19257: half the packages require C stuff to be compiled.
gollark: I described them as "basically like JS objects", even.
gollark: I guess. The limits are odd.
gollark: It's not an acronym.

See also

References
  1. Dean Hickerson's oscillator stamp collection. Retrieved on April 16, 2020.
  2. Entity Valkyrie (November 10, 2019). Re: Oscillator Discussion Thread (discussion thread) at the ConwayLife.com forums

Notes
  1. The name could be a reference to Hans Leo Hassler, a famous German composer.
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