#N p8009-gun.rle
#O 77topaz, 23 March 2018
#C 
#C A D8_1-symmetric four-barrelled period-8009 gun giving eight
#C copies of 3c/13 orthogonal spaceship. During a cycle (period is
#C prime), the core expands and shrinks slowly.
#C
#C Reference:
#C https://conwaylife.com/forums/viewtopic.php?p=58347#p58347
#C
#C For more discoveries in this rule, see catagolue census:
#C https://catagolue.hatsya.com/census/g9b3456s235678
x = 17, y = 17, rule = 235678/3456/9
7.3A$7.3A$4.HG5AGH$3.11A$2.H11AH$2.G11AG$2.13A$17A$17A$17A$2.13A$2.G
11AG$2.H11AH$3.11A$4.HG5AGH$7.3A$7.3A!
