L156

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L156
x = 29, y = 47, rule = B3/S23 19b2o$19bo$17b3o16$17b2o$17b2o2$8b2obo$8bob2o$26b2o$26bo$24bobo$24b2o 2$9bo$9b3o$o11bo$3o8b2o14bo$3bo22bobo$2b2o23bo7$bo$bobo$b3o$3bo11b2o$ 15bo$16b3o$18bo! ---- #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ ZOOM 8 X 0 Y 0 GPS 20 LOOP 157 PAUSE 2 T 156 PAUSE 2 WIDTH 480 HEIGHT 480 THUMBSIZE 2 ]]
Pattern type Conduit
Conduit type Composite
Input Herschel
Number of cells 56
Output orientation Turned left
Output offset (17, -41)
Step 156 ticks
Recovery time
(ignoring FNG if any)
62 ticks
Minimum overclock period
(ignoring FNG if any)
Unknown
Spartan? Yes
Dependent? No
Discovered by David Buckingham
Year of discovery 1996

L156 is a composite conduit, one of the original sixteen Herschel conduits, discovered by Dave Buckingham in August 1996. It is made up of three elementary conduits, HLx69R, RF28B, and BFx59H. After 156 ticks, it produces a Herschel turned 90 degrees counterclockwise at (17, -41) relative to the input. Its recovery time is 62 ticks. It can be made Spartan by replacing the snake with an eater 1 in one of two orientations. In the pattern shown in the infobox, a ghost Herschel marks the output location.

Three variants are shown below. The first is the one in the infobox. The second uses an alternative RF28B to produce a glider in a different direction. The third uses an RNE-19T84 to produce 2 extra gliders and double the period.

x = 74, y = 97, rule = B3/S23 19b2o38b2o$19bo39bo$17b3o37b3o16$17b2o38b2o$17b2o38b2o2$8b2obo36b2obo$ 8bob2o36bob2o$26b2o$26bo$24bobo$24b2o2$9bo39bo$9b3o37b3o$o11bo27bo11bo $3o8b2o14bo12b3o8b2o14bo$3bo22bobo14bo22bobo$2b2o23bo14b2o23bo4$64b2o$ 64bobo$66bo$bo39bo24b2o$bobo37bobo18b2o$b3o37b3o18bo$3bo11b2o26bo11b2o 6b3o$15bo39bo9bo$16b3o37b3o$18bo39bo4$59b2o$59bo$57b3o16$57b2o$57b2o2$ 48b2obo$48bob2o2$33b2o$33bo16bo$31bobo15bobo$31b2o16bobo$47b3ob2o20bo$ 46bo24b3o$40bo6b3ob2o17bo$40b3o6bob2o17b2o$43bo$18bo23b2o$16b3o48b2o$ 16bobo47bo2bo$16bo50b2o4$41bo$41bobo$30b2o9b3o$17b2o11b2o11bo11b2o$18b o36bo$15b3o38b3o$15bo42bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART THUMBSIZE 2 ZOOM 10 WIDTH 480 HEIGHT 1750 X 8 GPS 16 PAUSE 2 T 73 PAUSE 2 T 77 PAUSE 2 T 97 PAUSE 2 T 108 PAUSE 2 T 156 PAUSE 2 T 399 PAUSE 2 LOOP 157 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here

The third L156 variant produces an extra block, which is period-doubling. In the viewer, a Herschel coming 77 generations earlier will be blocked. For it not be period-doubling, it must be:

  1. deleted using a reflector (such as the p8 bumper + dependent conduit);
  2. deleted using a set of conduits (e.g. R64 + F117);


L156 as an injector

The BFx59H in the second variant of the L156 can act as an injector.

Warning: The following viewer will pause 10 times.

The viewer below shows the reaction of injecting a Herschel into an existing track using a L156. Ghost herschels mark the output locations, and a duoplet marks the block produced in the period-doubling L156 on the north-east

x = 133, y = 144, rule = B3/S23 100b2o$101bo$88bo11bo$88b3o9b2o$91bo$78b2o10b2o39bo$79bo50bobo$79bobo 48bobo$65b2o13b2o49bo$65b2o36b2o15bo$103b2o15bo$120b3o$59b2o61bo$59b2o $63b2o$63b2o15bo$80bo$80b3o$82bo11b2o$58b2o34bo$58b2o35b3o$97bo$78bo3b 2o$77bobo3bo$77b2o3bo$81bo$77b5obo$72b2o3bo4bobo$62bo9bo6bo2bobo$63bo 6b3o5b2o3bo$60b3o$60bo14$70b2o$70b2o$o$b2o58b2obo$2o59bob2o3$63bo$62bo bo$62bobo$60b3ob2o20bo$59bo24b3o$53bo6b3ob2o17bo$53b3o6bob2o4b2o11b2o$ 56bo13b2o$39b2o14b2o$39b2o39b2o$79bo2bo$80b2o$33b2o$33b2o$37b2o$37b2o 15bo$54bo$54b3o$56bo11b2o$32b2o34bo$32b2o35b3o$61bo3b2o4bo$52bo3b2o2bo bo3bo$51bobo3bo2b2o3bo$51b2o3bo7bo$55bo4b5obo$51b5obo2bo4bobo$46b2o3bo 4bobobob2obobo$46bo6bo2bobob2obob2o$44b3o5b2o3bo16$44b2o$44b2o2$35b2ob o$35bob2o$20bo$18b3o$17bo$17b2o2$36bo$36b3o$27bo11bo$27b3o8b2o14bo$30b o22bobo$29b2o23bo4$51b2o$51bobo$53bo$28bo24b2o$28bobo18b2o$17b2o9b3o 18bo$17b2o11bo11b2o6b3o$42bo9bo$43b3o$45bo16$91b2o$91bobo$91bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART THUMBSIZE 2 ZOOM 8 WIDTH 600 HEIGHT 800 X 6 Y -8 GPS 20 PAUSE 2 T 73 PAUSE 2 T 97 PAUSE 2 T 156 PAUSE 2 T 220 PAUSE 2 T 231 PAUSE 2 T 293 PAUSE 2 T 295 PAUSE 2 T 317 PAUSE 2 T 328 PAUSE 2 T 376 PAUSE 2 LOOP 377 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
  • In the first pause, the Herschel reached generation 4 of the R-pentomino.
  • In the second pause, the Herschel reached the BFx59H, the exact conduit that the gliders will be injecting into.
  • In the third pause, the original Herschel reached the R64 conduit. The gliders are in the position to be injected.
  • In the fourth pause, the original Herschel passes the R64. The new Herschel is in the process of injecting.
  • In the fifth pause, the new Herschel is successfully injected.

In pauses 6-10, it shows the procedure of removing the new Herschel.

  • In the sixth pause, the original Herschel reached generation 4 of the R-pentomino.
  • In the seventh pause, the new Herschel passes the R64. By using an RNE-19T84 instead of the standard L156 catalyst, the new herschel can be blocked.
  • In the eighth pause, the original Herschel reached the BFx59H. It is in the position to block the new Herschel.
  • In the ninth pause, the original Herschel (which is currently in a temporary R-pentomino phase in the BFx59H) leaves a block (in where the duoplet originally was), which will remove the new Herschel.
  • In the tenth pause, the new Herschel was destroyed by the block. The original Herschel evolves normally, continuing along the Herschel track.

Note that you can instead remove the original Herschel by putting a block in the position of the duoplet.

External links