Period-7 sparkers

Sparkers
Lists	p7 • p8 • p9 • p10
Related	With specific period With specific spark type

This is a list of known period-7 sparkers. While such sparkers can still be found with JLS and WLS, due to the relatively high period, such searches can take weeks or months to complete.

Dot sparkers and functional dot sparkers

x = 9, y = 16, rule = B3/S23 bo2bo$5bo$o5bo$2o4bo$5bo$4bo$3b4obo$3bo3bo$bo3bo$ob4o$4bo$3bo$2bo4b2o$ 2bo5bo$3bo$4bo2bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 4 THUMBSIZE 2 ZOOM 13 ]]

34P7: A small corner-dot sparker. Similar to meatball, with lower population but larger bounding box. Sometimes 34P7 will work where meatball doesn't and vice versa (click above to open LifeViewer) RLE: here Plaintext: here

x = 13, y = 11, rule = B3/S23 4bo3bo$o2bobobobo2bo$obo2bobo2bobo$bo2b2ob2o2bo$5bobo$2b2o5b2o$2bo7bo$ 4bo3bo2$bo2bo3bo2bo$2b2o5b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 4 THUMBSIZE 2 ]]

38P7.2: It is not very robust, and its dot spark is not isolated (click above to open LifeViewer) RLE: here Plaintext: here

x = 11, y = 11, rule = B3/S23 8bo$3b2o4b2o$b3ob2o2b2o$o8bo$bob2o$bobo3bobo$6b2obo$bo8bo$2o2b2ob3o$2o 4b2o$2bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 4 THUMBSIZE 2 ]]

Meatball: A small, robust sparker that emits dot sparks with decent clearance. Similar to 34P7, with higher population but smaller bounding box. Sometimes meatball will work where 34P7 doesn't and vice versa (click above to open LifeViewer) RLE: here Plaintext: here

x = 14, y = 20, rule = B3/S23 5bo$5bo2$3bo3bo$b3obob3o$o4bo4bo$b4obobobo$4bobo4b2o$b2obo2bob2o2bo$b 2obo3bobob2o$5bo4bobo$10bo2bo$6bo4b3o$7b4o$11bo$3b2obobob2o$3bob2ob2o$ 7bo3b3o$7bob2o2bo$8bobo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 4 THUMBSIZE 2 ]]

p7 pipsquirter: mainly functions as a dot, but also has rarer uses as a vertical domino (click above to open LifeViewer) RLE: here Plaintext: here

[[:RLE:Pipsquirter2]] #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 4 THUMBSIZE 2 ]]

An edgier form of the p7 pipsquirter. In most cases, the other form is more useful, but it depends on the dimensions (click above to open LifeViewer) RLE: here Plaintext: here

x = 19, y = 10, rule = B3/S23 6bo6bo$5bo3b2o3bo$4bo3b4o3bo$bo2bobob4obobo$obobobo6bobob2o$bo2bob2o4b 2ob2obo$4bo4b2o$5b3obo$7bobo$8bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 4 THUMBSIZE 2 ]]

p7 thumb: Being only 10 cells thick, it's useful for reducing bounding boxes. It's also useful if two sparks need to be close together; in addition to it naturally being a double sparker (spacing 8), the tub on the left can be replaced with a gutter (spacing 7), be replaced with a block (spacing 10), remain as a tub (spacing 11), or become a beehive (spacing 12), and a second copy can be added on the other side (click above to open LifeViewer) RLE: here Plaintext: here

x = 25, y = 25, rule = B3/S23 8bo7bo$6bo3bo3bo3bo$5bo4bo3bo4bo$11bobo$7b3obobob3o$2bo4bo3bobo3bo4bo$ bo9bobo9bo$4b2o5bobo5b2o$o3bo6bobo6bo3bo$4bo5bo3bo5bo$b2o6bo5bo6b2o$3b 6o7b6o2$3b6o7b6o$b2o6bo5bo6b2o$4bo5bo3bo5bo$o3bo6bobo6bo3bo$4b2o5bobo 5b2o$bo9bobo9bo$2bo4bo3bobo3bo4bo$7b3obobob3o$11bobo$5bo4bo3bo4bo$6bo 3bo3bo3bo$8bo7bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 4 THUMBSIZE 2 ]]

120P7: a relatively large middleweight sparker, sometimes used as a duoplet sparker (click above to open LifeViewer) RLE: here Plaintext: here

x = 41, y = 30, rule = B3/S23 33b2o$32bo2bo$32b2obo$35b3o$32b2o4bo$31bob4o$30bo5bo$30b6o4bo$28b2o5bo $27bo2b2o3b2o2bo$27bobo2b2o2b3o$26b2ob2obobobo$27bobo3b2o$23b2o2bo3b4o $22bo2bobo3b2o$22bob2obobo$21b2o4bobo$12b2o6bo2bobob2o$8b2obo2bo3bo2b 2o$6b3o3b2obo2b3o2b6o$5bo4b2o3bo6bo4b2o$5b5o2b3ob6obo$6bo4bo2bo8b2o$2o 3b2ob2obo3b2o3bo$o2bob2ob2o6bo3b2o$2b2obobo3bo$3bobob4obobobo$3bo2bo5b ob2obo$4bobo2b3o5bo$5bo3bo7b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 4 THUMBSIZE 2 ]]

168P7: large but nevertheless sometimes necessary. The original form of the period-49 glider gun used these sparkers (click above to open LifeViewer) RLE: here Plaintext: here

x = 24, y = 23, rule = B3/S23 17b2o$17bo2bo2$21bo$18bo$10b2o6b2o$10bobo2b3o$12bo2b3o$12b2ob2o$3b2o5b 2o6bobo$4bo4bo2b3o3bob3o$3bo3bo2bobo3bobo4bo$2bob7o2b2obobob3o$2bobo6b obo3bo2bo$b2o3b3obo2bobobobo$2bob2obobo3b2obobo$o2bobobobo2b3obo$2obob obobob2o3bo$3bobo3bobobobo$3bo2b2obobob2o$2b2o4bobobo$8bo3bo$7b2o3b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 4 THUMBSIZE 2 ]]

121P7: smaller and edgier than 168P7 but not as robust (click above to open LifeViewer) RLE: here Plaintext: here

x = 29, y = 19, rule = B3/S23 5b2o$6bo8b2o$5bo5b2o2bo2bo4bobo$5b2o4bobobob2o3bob2o$13bobo6bo$8b2o5bo b2o2b2ob4o$b3o11bobobo4bo3bo$6bob2o3bobobob2obo3bobo$5b2ob2o2bobob2o2b obob4o$o2bo4b2o7b3o$5b2ob2o2bobob2o2bobob4o$6bob2o3bobobob2obo3bobo$b 3o11bobobo4bo3bo$8b2o5bob2o2b2ob4o$13bobo6bo$5b2o4bobobob2o3bob2o$5bo 5b2o2bo2bo4bobo$6bo8b2o$5b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 4 THUMBSIZE 2 ]]

138P7: can be used if the side middleweight sparks interfere (click above to open LifeViewer) RLE: here Plaintext: here

x = 19, y = 15, rule = B3/S23 9bo$9bo$8b3o2$b2o3b2o3b2o3b2o$o2bo5bo5bo2bo$3o13b3o$3b3o7b3o$2o3b4ob4o 3b2o$ob2o3bo3bo3b2obo$2bo2bo2bobo2bo2bo$o2b2o2b2ob2o2b2o2bo$2obo11bob 2o$3bo11bo$3b2o9b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 4 THUMBSIZE 2 ]]

T-nosed p7: usually outclassed by the p7 pipsquirter (click above to open LifeViewer) RLE: here Plaintext: here

Domino sparkers

Edgy domino sparks can sometimes be used as dots.

x = 18, y = 14, rule = B3/S23 8b2o$6bo4bo$2b2obo6bob2o$bob4o4b4obo$bobob8obobo$2obo2b6o2bob2o$o2bo 10bo2bo$2bo2bo6bo2bo$3b2o8b2o$5bo6bo$3b2o3b2o3b2o$3bo3bo2bo3bo$bobo4b 2o4bobo$b2o12b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 4 THUMBSIZE 2 ]]

62P7: A small and highly robust sparker, which is usually the best option for a domino spark (click above to open LifeViewer) RLE: here Plaintext: here

[[:RLE:563P7]] #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 4 THUMBSIZE 2 ]]

563P7: Sometimes 62P7 is too wide, so the very large 563P7 is needed instead. There are also a few rare uses where the active reaction destroys 62P7 but not 563P7 (click above to open LifeViewer) RLE: here Plaintext: here

x = 16, y = 16, rule = B3/S23 11bo$10bobo$10bobo$9b2obob2o$12b2obo$8bob2o$11bo$8b3o$5bobo$3bo3bob2o$ b3obobob2o$o4b2o$b4o$4bo$3bo$3b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 4 THUMBSIZE 2 ]]

44P7.2: produces a small, edgy, delayed domino. It usually doesn't work, but if it does, it should be used (click above to open LifeViewer) RLE: here Plaintext: here

x = 13, y = 9, rule = B3/S23 2b2o9b$2bo10b$7bo5b$6obo5b$o12b$b2ob2o3b2o2b$2bobo4bobob$2bobo6bob$3bo 7b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 4 THUMBSIZE 2 ]]

28P7.1: The spark is weak enough that it usually can't be used to sustain something else; instead, it gets used more as part of a phase-changing mechanism (7n+1). Oscillators that phase change in this way typically work just as well without the 28P7.1 (click above to open LifeViewer) RLE: here Plaintext: here

x = 22, y = 14, rule = B3/S23 10b2o$8b6o$7b8o$6bo8bo$5b2o8b2o$3b3ob8ob3o$2bob2o2b6o2b2obo$b2ob2o4b2o 4b2ob2o$2bo2b2o8b2o2bo$o2bobo10bobo2bo$2obobobo6bobobob2o$3bo2b2o6b2o 2bo$2obo14bob2o$obo16bobo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 4 THUMBSIZE 2 ]]

60P7: if the active reaction doesn't recede by generation 3, it will be destroyed. The main advantage of this over 62P7 is that the sides don't stick as far out in front, meaning it often fits in places where 62P7 doesn't. Despite the spark not being isolated, this doesn't make it any less useful (click above to open LifeViewer) RLE: here Plaintext: here

x = 28, y = 14, rule = B3/S23 13b2o$b2o8b6o8b2o$3bo5b10o5bo$2bo2b2o14b2o2bo$bo3bo16bo3bo$o2bo3bob10o bo3bo2bo$b4o6b6o6b4o$13b2o$b4o18b4o$o2bo3bobo8bobo3bo2bo$bo3bo4bo6bo4b o3bo$2bo2b2o3bo6bo3b2o2bo$3bo5bo8bo5bo$b2o22b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 4 THUMBSIZE 2 ]]

The original form of 60P7 found by Josh Ball. It has worse clearance, but it recedes faster in generation 1 which can allow it to work in cases where 60P7 does not. The two support types can also be combined to make a hybrid (click above to open LifeViewer) RLE: here Plaintext: here

x = 18, y = 25, rule = B3/S23 4bo3b2o3bo$3bobobo2bobobo$3bobo6bobo$b3obo6bob3o$o4bob4obo4bo$b3obob4o bob3o$3bo2b2o2b2o2bo$6bo4bo$7bo2bo$8b2o$3bo10bo$b3o10b3o$o5b6o5bo$b3o 10b3o$3bo10bo$8b2o$7bo2bo$6bo4bo$3bo2b2o2b2o2bo$b3obob4obob3o$o4bob4o bo4bo$b3obo6bob3o$3bobo6bobo$3bobobo2bobobo$4bo3b2o3bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 4 THUMBSIZE 2 ]]

132P7: If the active reaction doesn't recede by generation 4, it will be destroyed (click above to open LifeViewer) RLE: here Plaintext: here

x = 24, y = 18, rule = B3/S23 4b2o3bo4bo3b2o$bo2bo2bo2bo2bo2bo2bo2bo$obobob2obo4bob2obobobo$bo2bo2bo bob2obobo2bo2bo$4b2o3b2o2b2o3b2o$8bo6bo$7bo8bo$6bo10bo$7b2o6b2o2$3b2o 2b2o6b2o2b2o$3bo2bo10bo2bo$4bobo3bo2bo3bobo$3b2obobob4obobob2o$7b2o6b 2o$9b2o2b2o$9bo2bobo$10b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 4 THUMBSIZE 2 ]]

Hebdarole: This sparker is more historically significant than useful, as it has been outclassed by the newer sparkers in the section (click above to open LifeViewer) RLE: here Plaintext: here

Other sparkers

As these sparkers have unique sparks, they have specialized uses.

x = 10, y = 13, rule = B3/S23 obo$2obo$3bo2b2o$2obobobo$o2bo2bo$2bo$4bo$2b3o2$6b2o$6bobo$8bo$8b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 4 THUMBSIZE 2 ]]

28P7.3: Used in the period-21 glider gun (click above to open LifeViewer) RLE: here Plaintext: here

x = 12, y = 10, rule = B3/S23 4b2o$2o3bo$bo3bobo$bob2obobob2o$2bobobob2obo$4bo$2bo5b3o$o9bo$o3b4obo$ bo5b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 4 THUMBSIZE 2 ]]

37P7.1, used in the smallest period-126 glider gun (Catagolue: here) (click above to open LifeViewer) RLE: here Plaintext: here

x = 13, y = 14, rule = B3/S23 9b2o$9bo$10bo$9b2o$8bo$9b2o$8bo2bo$3bob5o2bo$b3obo4b2o$o4bobobo$b4o4bo $5b4o$3bo2bo$3b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 4 THUMBSIZE 2 ]]

41P7.2, duoplet sparker (click above to open LifeViewer) RLE: here Plaintext: here

x = 42, y = 17, rule = B3/S23 4b2obobobo$4bob2ob2obo3b2o$8bo3bo3bo4b2o$5b2o3b2ob2obo5bo5b2o3bobo$5bo b3obobobo4bo4bo2bobobob2o$7bo11bob5o4bobo$7b2o3bo6bobo4b4obob5o$6b2ob 2o3bo3b2o3b2obo4bo4bobo$bo3bo6b2o3bo3bobo2b2o2bobobo3bo2bo$o2bobob2o3b o4b5obo3bo2bobobo2bob3o$obobobobo4bo3bo3bobo3bobobobo4bo$2bobobobob5ob ob4obobobobobobobo3bo$obob2obob2o4b2obo3bobobo3b2obob4o$2o5bo4b2o5bo2b o2bo8bo$7bob2obo7bobo13bo$8bobobo8bo13b2o$11bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 4 THUMBSIZE 2 ]]

189P7, a banana sparker custom-designed for the p49 skewed pulsar hassler (click above to open LifeViewer) RLE: here Plaintext: here

See also

• Medusa, a period-28 glider gun which uses an even larger p7 sparker than 678P7
• 34P14 shuttle, which is smaller than almost all of the above and is a good alternative as long as the mechanism works at period 14
• p21 honey farm hassler, which is a pipsquirter that is a good alternative as long as the mechanism works at period 21