Traffic light: Difference between revisions
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The '''traffic light''' is a common formation of four [[blinker]]s and is the most common member of the [[familiar fours]], also being the only one made from [[oscillator]]s. A common predecessor is the [[T-tetromino]]. Although it behaves the same in some important non-standard [[rules]] such as [[HighLife]] as it does in [[Conway's Game of Life|standard Life]], it does not appear nearly as frequently in many of those rules due to its common [[predecessor]]s being unstable.<ref>[http://www.tip.net.au/~dbell/articles/HighLife.zip HighLife - An Interesting Variant of Life] by David Bell (.zip file)</ref> | The '''traffic light''' is a common formation of four [[blinker]]s and is the most common member of the [[familiar fours]], also being the only one made from [[oscillator]]s. A common predecessor is the [[T-tetromino]]. Although it behaves the same in some important non-standard [[rules]] such as [[HighLife]] as it does in [[Conway's Game of Life|standard Life]], it does not appear nearly as frequently in many of those rules due to its common [[predecessor]]s being unstable.<ref>[http://www.tip.net.au/~dbell/articles/HighLife.zip HighLife - An Interesting Variant of Life] by David Bell (.zip file)</ref> | ||
Drawing a single cell in the middle of the traffic light while it is in its + phase will eat the whole traffic light leaving nothing behind. | Drawing a single cell in the middle of the traffic light while it is in its + phase will eat the whole traffic light, leaving nothing behind. Instead drawing a cell a knight's move away results in a clean [[fishhook]]. | ||
==See also== | ==See also== | ||
Revision as of 23:54, 4 January 2021
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| Pattern type | Constellation Oscillator | ||||||||
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| Number of cells | 12 | ||||||||
| Bounding box | 9 × 9 | ||||||||
| Period | 2 (mod: 2) | ||||||||
| Heat | 16 | ||||||||
| Volatility | 0.80 | 0.80 | ||||||||
| Kinetic symmetry | Unspecified | ||||||||
| Discovered by | JHC group | ||||||||
| Year of discovery | 1970 | ||||||||
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The traffic light is a common formation of four blinkers and is the most common member of the familiar fours, also being the only one made from oscillators. A common predecessor is the T-tetromino. Although it behaves the same in some important non-standard rules such as HighLife as it does in standard Life, it does not appear nearly as frequently in many of those rules due to its common predecessors being unstable.[1]
Drawing a single cell in the middle of the traffic light while it is in its + phase will eat the whole traffic light, leaving nothing behind. Instead drawing a cell a knight's move away results in a clean fishhook.
See also
References
- ↑ HighLife - An Interesting Variant of Life by David Bell (.zip file)
External links
- Traffic light at the Life Lexicon
- Traffic light at Adam P. Goucher's Catagolue (pseudo-object)
Categories:
- Patterns
- Oscillators with 12 cells
- Periodic objects with minimum population 12
- Patterns with 12 cells
- Patterns found by JHC group
- Patterns found in 1970
- Patterns that can be constructed with 2 gliders
- Oscillators
- Constellations
- Constellations with 12 cells
- Oscillators with period 2
- Oscillators with mod 2
- Oscillators with heat 16
- Oscillators with volatility 0.80
- Oscillators with strict volatility 0.80
- Patterns with complete square symmetry