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- #N Crystal & Decay 2700
- #O Dean Hickerson, drhickerson@ucdavis.edu 3/27/90
- #C A p150 gun fires at a pair of pentadecathlons. When
- #C the first glider hits the PDs, it is reflected back
- #C and hits the second, forming a honey farm. Subsequent
- #C gliders form a crystal growing upstream. When the
- #C crystal reaches an eater near the gun, it begins to
- #C decay. When it's all gone, the cycle begins again.
- #C The period of this pattern is 2700, but by moving the
- #C PDs, any period of the form 750 + 1950n (n>=0) can
- #C be obtained.
- #P -14 -23
- **
- **
- #P -11 -23
- .
- .
- #P -17 -19
- ...*
- ..***
- .*...*
- ...*
- *.....*
- #P -17 -14
- *.....*
- .*...*
- ..***
- #P 5 -16
- **
- *.*
- .***
- ..***
- #P 5 -12
- .***
- *.*
- **
- #P 17 -14
- ....*
- .****
- ****
- *..*
- #P 17 -10
- ****
- .****
- ....*
- #P -4 -13
- **
- **
- #P -1 -13
- .
- .
- #P 30 -11
- *
- *
- #P 31 -11
- *
- *
- #P -12 -7
- *
- .
- .
- *
- #P -14 -3
- *.*
- .**
- #P -19 2
- **
- .
- .*
- ..***
- ..***
- #P -14 2
- **
- .
- *
- #P 14 9
- ..*
- ***
- #P 13 11
- *
- **
- #P -16 11
- **
- **
- #P -13 11
- .
- .
- #P 1 19
- **
- *
- #P 2 21
- ***
- ..*
- #P 45 47
- ..**
- .*..*
- ******
- #P 46 50
- *..*
- .**
- #P 53 47
- ..**
- .*..*
- ******
- #P 54 50
- *..*
- .**
- #P 40 59
- ***
- *.*
- ***
- ***
- #P 40 63
- ***
- ***
- *.*
- ***
-