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/programs/demos/life2/lif/CRYSTAL.lif
0,0 → 1,85
#Life 1.05
#D Crystal&decay 2700
#D
#D A p150 gun fires at a pair of pentadecathlons. When the first glider
#D hits the PDs, it is reflected back and hits the second, forming a
#D honey farm. Subsequent gliders form a crystal growing upstream. When
#D the crystal reaches an eater near the gun, it begins to decay.
#D When it's all gone, the cycle begins again.
#D
#D The period of this pattern is 2700, but by moving the PDs, any period
#D of the form 750 + 1950n (n>=0) can be obtained.
#D Dean Hickerson, dean@ucdmath.ucdavis.edu 3/27/90
#N
#P -14 -23
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**
#P -17 -19
...*
..***
.*...*
...*
*.....*
*.....*
.*...*
..***
#P -19 2
**...**
.
.*...*
..***
..***
#P -16 11
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#P -4 -13
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#P 5 -16
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*.*
.***
..***
.***
*.*
**
#P 17 -14
....*
.****
****
*..*
****
.****
....*
#P 30 -11
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**
#P 13 9
...*
.***
*
**
#P 1 19
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*
.***
...*
#P 45 47
..**......**
.*..*....*..*
******..******
.*..*....*..*
..**......**
#P 40 59
***
*.*
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*.*
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#P -14 -4
..*
*.*
.**