Pattern Library And you do many things like that.

- U -

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  unidimensionaltumblerpredecessor

  https://conwaylife.com/wiki/One-cell-thick_pattern https://www.conwaylife.com/patterns/unidimensionaltumblerpredecessor.rle

  Size:36x1 | Rule:23/3

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  unix_synth

  Glider synthesis of unix.

  Size:121x26 | Rule:23/3 | @lifewiki

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  upsnakeontable

  https://conwaylife.com/wiki/Up_snake_on_table https://www.conwaylife.com/patterns/upsnakeontable.rle

  Size:7x4 | Rule:23/3

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  unixonrichsp16

  https://conwaylife.com/wiki/Unix_on_Rich%27s_p16 https://conwaylife.com/patterns/unixonrichsp16.rle

  Size:23x17 | Rule:23/3

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  unidimensional2unidimensional1

  https://conwaylife.com/wiki/One-cell-thick_pattern https://www.conwaylife.com/patterns/unidimensional2unidimensional1.rle

  Size:48x1 | Rule:23/3

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  unidimensionalinfinitegrowth

  Infinite growth resulting from a single row of live cells.

  Size:39x1 | Rule:23/3 | @lifewiki

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  unidimensionalpentadecathlon

  A unidimensional pattern that is a predecessor of the pentadecathlo n.

  Size:10x1 | Rule:23/3 | @lifewiki

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  unidimensionalsixgliders

  The smallest unidimensional pattern to emit a glider.

  Size:15x1 | Rule:23/3 | @lifewiki

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  unixonp45piheptominohassler

  https://conwaylife.com/wiki/P45_pi-heptomino_hassler https://www.conwaylife.com/patterns/unixonp45piheptominohassler.rle

  Size:31x23 | Rule:23/3

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  unidimensional2unidimensional2

  https://conwaylife.com/wiki/One-cell-thick_pattern https://www.conwaylife.com/patterns/unidimensional2unidimensional2.rle

  Size:77x1 | Rule:23/3

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  unidimensionalnothing

  A unidimensional pattern that dies out completely. Found in October 1998.

  Size:149x1 | Rule:23/3 | @lifewiki

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  unixon30p25

  https://conwaylife.com/wiki/30P25 https://www.conwaylife.com/patterns/unixon30p25.rle

  Size:23x23 | Rule:23/3

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  upwingonwing

  https://conwaylife.com/wiki/Up_wing_on_wing https://conwaylife.com/patterns/upwingonwing.rle

  Size:9x4 | Rule:23/3

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  unixon34p14shuttle

  https://conwaylife.com/wiki/Unix_on_34P14_shuttle https://conwaylife.com/patterns/unixon34p14shuttle.rle

  Size:18x22 | Rule:23/3

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  unix

  A period 6 oscillator that consists of two blocks eating a barge. https://www.conwaylife.com/wiki/index.php?title=Unix

  Size:8x8 | Rule:23/3

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  uturnerpredecessor2

  https://conwaylife.com/wiki/U-turner https://www.conwaylife.com/patterns/uturnerpredecessor2.rle

  Size:5x4 | Rule:23/3

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  unidimensional6glidergenerator

  https://conwaylife.com/wiki/One-cell-thick_pattern https://www.conwaylife.com/patterns/unidimensional6glidergenerator.rle

  Size:15x1 | Rule:23/3

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  unicycle_synth

  Glider synthesis of unicycle. https://www.conwaylife.com/ref/mniemiec/objname.htm#U

  Size:146x91 | Rule:23/3

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  unidimensionaltumbler

  A 1-cell-thick pattern that creates a tumbler. Found in October 199 8.

  Size:36x1 | Rule:23/3 | @lifewiki

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  upentomino

  One of the 12 pentominoes.

  Size:3x2 | Rule:23/3 | @lifewiki

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  unidimensionalpentadecathlonpredecessor

  https://conwaylife.com/wiki/One-cell-thick_pattern https://www.conwaylife.com/patterns/unidimensionalpentadecathlonpredecessor.rle

  Size:10x1 | Rule:23/3

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  uturnerpredecessor

  https://conwaylife.com/wiki/U-turner https://www.conwaylife.com/patterns/uturnerpredecessor.rle

  Size:3x6 | Rule:23/3

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  unidimensional4glidergenerator

  https://conwaylife.com/wiki/One-cell-thick_pattern https://www.conwaylife.com/patterns/unidimensional4glidergenerator.rle

  Size:56x1 | Rule:23/3

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  unsynthesizableoscillator1

  https://conwaylife.com/wiki/Unsynthesizable_oscillator_1 https://www.conwaylife.com/patterns/unsynthesizableoscillator1.rle

  Size:60x53 | Rule:23/3

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  unixonp76piheptominohassler

  https://conwaylife.com/wiki/P76_pi-heptomino_hassler https://www.conwaylife.com/patterns/unixonp76piheptominohassler.rle

  Size:36x28 | Rule:23/3

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  undecapole

  https://conwaylife.com/wiki/Undecapole https://conwaylife.com/patterns/undecapole.rle

  Size:14x14 | Rule:23/3

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  unicycle

  A period 6 oscillator made up of four copies of unix.

  Size:14x14 | Rule:23/3 | @lifewiki

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  unidimensionalfourgliders

  A solid 56-by-1 rectangle that is the shortest solid rectangle to p roduce a glider.

  Size:56x1 | Rule:23/3 | @lifewiki

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  uturner

  https://conwaylife.com/wiki/List_of_common_evolutionary_sequences https://www.conwaylife.com/patterns/uturner.rle

  Size:4x4 | Rule:23/3

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  undecominotoglider

  https://conwaylife.com/wiki/Pure_glider_generator https://www.conwaylife.com/patterns/undecominotoglider.rle

  Size:6x2 | Rule:23/3

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  updoveondove

  18-bit still life #355 in Mark D. Niemiec's life synthesis database https://www.conwaylife.com/wiki/Up_dove_on_dove https://codercontest.com/mniemiec/18/18-355.rle

  Size:9x5 | Rule:23/3

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  unixonmerzenichsp31

  https://conwaylife.com/wiki/Merzenich%27s_p31 https://www.conwaylife.com/patterns/unixonmerzenichsp31.rle

  Size:24x28 | Rule:23/3

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  unixon41p7.2

  A small non-trivial period 42 oscillator

  Size:18x18 | Rule:23/3 | @lifewiki

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  unnamedsmalllakerelative

  https://conwaylife.com/wiki/Small_lake https://www.conwaylife.com/patterns/unnamedsmalllakerelative.rle

  Size:9x9 | Rule:23/3

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  uninterestingp24

  https://conwaylife.com/wiki/Uninteresting_p24 https://conwaylife.com/patterns/uninterestingp24.rle

  Size:26x15 | Rule:23/3

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  unixoncharitysp16

  https://conwaylife.com/wiki/Charity%27s_p16 https://www.conwaylife.com/patterns/unixoncharitysp16.rle

  Size:24x16 | Rule:23/3