4035bec ^
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Life←{ r←¯1(⌽⎉1)¯1⌽(2+≢𝕩)↑𝕩 s←∨´ (1∾<r) ∧ 3‿4 = <+´⥊ ¯1‿0‿1 (⌽⎉1)⌜ ¯1‿0‿1 ⌽⌜ <r 1(↓⎉1) ¯1(↓⎉1) 1↓ ¯1↓s } blinker←>⟨0‿0‿0,1‿1‿1,0‿0‿0⟩ (<".#") ⊏¨˜ Life⍟(↕3) blinker