User:Entity Valkyrie 2/P20 double backrake

x = 27, y = 27, rule = B3/S23 2b2o$o4bo$6bo7b2o8b2o$o5bo3b4ob2o5b2ob2o$b6o3b6o6b4o$11b4o8b2o3$2o3b2o 15bo$obo2b2o15b2o$o13b3o6b2o$15bobo4b2o$16b2o2$16b2o$15bobo4b2o$o13b3o 6b2o$obo2b2o15b2o$2o3b2o15bo3$11b4o8b2o$b6o3b6o6b4o$o5bo3b4ob2o5b2ob2o $6bo7b2o8b2o$o4bo$2b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THEME 6 HEIGHT 340 WIDTH 480 ZOOM 12 GPS 5 AUTOSTART TRACK 10/20 0/20 LOOP 20 ]]

P20 double backrake
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The rake shown on the right is a P20 double backrake. The period is 20 and moves at the speed of (10,0)/20. It consists of a twin bee puffer stabilized by two HWSS to create two blocks and two gliders, and the blocks are quickly destroyed by two more HWSS before the next pair of gliders hit it.