Lightweight emulator
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Lightweight emulator  
View animated image  
View static image  
Pattern type  Oscillator  

Family  Emulator  
Number of cells  30  
Bounding box  14 × 6  
Period  4  
Mod  4  
Heat  12  
Volatility  0.45  
Strict volatility  0.36  
Discovered by  Robert Wainwright  
Year of discovery  1980  
 
 
 

Lightweight emulator is a period4 oscillator found by Robert Wainwright in June 1980^{[1]} that produces sparks similar to those produced by the lightweight spaceship. It is the smallest and least useful of the three standard emulators.
This oscillator first appeared seminaturally in September 2016.^{[2]} A 13glider synthesis is known for a stator variant^{[3]} featuring loaves; with appropriate component to convert them to preblocks, the canonical form can be synthesized from 21 gliders.^{[4]} On January 22, 2023, the synthesis was reduced to 15 gliders based on a soupbased reaction that generates the canonical variant directly.^{[5]} Larger, higherclearance sparkers are shown below.
A way more accessible 20 × 18 106cell p4 lightweight sparker^{[6]} (click above to open LifeViewer) RLE: here Plaintext: here Catagolue: here 
A (slightly more accessible still) 20 × 19 96cell p4 lightweight sparker (click above to open LifeViewer) Catagolue: here 
Other variants
Dual lightweight sparker (occurred as a stator variant; Catagolue: here) (click above to open LifeViewer) Catagolue: here 
See also
References
 ↑ Dean Hickerson's oscillator stamp collection. Retrieved on March 14, 2020.
 ↑ praosylen (September 9, 2016). Re: Soup search results (discussion thread) at the ConwayLife.com forums
 ↑ xp4_2596o696zw6fvz4a961696 at Adam P. Goucher's Catagolue
 ↑ iNoMed (April 5, 2021). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
 ↑ Carson Cheng (January 22, 2023). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
 ↑ James Pascua (May 22, 2021). Re: JP21's Lonely Freedomical Room (discussion thread) at the ConwayLife.com forums
External links
 LW emulator at the Life Lexicon
 Lightweight emulator at Adam P. Goucher's Catagolue
 30P4.5 at Heinrich Koenig's Game of Life Object Catalogs
Categories:
 Patterns
 Oscillators with 30 cells
 Periodic objects with minimum population 30
 Patterns with 30 cells
 Patterns found by Robert Wainwright
 Patterns found in 1980
 Patterns that can be constructed with 15 gliders
 Patterns that can be constructed with 13 gliders
 Oscillators
 Emulator variants
 Oscillators with period 4
 Oscillators with mod 4
 Oscillators with heat 12
 Oscillators with volatility 0.45
 Oscillators with strict volatility 0.36
 Patterns with bilateral orthogonal symmetry
 Sparkers
 Sparkers with period 4
 Dot sparkers
 Moderate sparkers
 Seminatural periodic objects