x = 10, y = 13, rule = B3/S23
#C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]]
#C [[ THEME 6 HEIGHT 320 WIDTH 480 ZOOM 16 ]]
The oscillator shown on the right is a 25-cell variant of the T-nosed p4. The period is 4.