#N Pentadecathlon
#O John Conway, 1970
#C Conway found it by running a row of ten cells. Period 15 - unusually long for something so small - and it emits sparks that make it a useful component in larger machines.
#C Exported from Lifeform
x = 10, y = 3, rule = B3/S23
2bo4bo2b$2ob4ob2o$2bo4bo2b!