Alternating rules

[J5L]

A rule with some 2 cell stuff:

Code: Select all

x = 89, y = 4, rule = B1c2e/S2c|B2ei5i/S3i6i
2bo43bo37bo3bo$9bo5bo8bo$o26bo$43bo!

It has 3 2 cell oscillators, a 2 cell replicator, and a 2 cell failed replicator.
Sadly the rule is explosive because of a common replicator puffer and the replicator.
EDIT 1: Found a new 2 cell oscillator.

[yyh_baboon]

P548 in simple rule:(explosive due to 2D rep being common)

Code: Select all

 x = 22, y = 22, rule = B13/S2ei|B/S013-j
16bo$17bo3$12bo7bo$13bo7bo3$16bo$17bo3$4bo$5bo3$o7bo$bo7bo3$4bo$5bo!

P452:

Code: Select all

 x = 6, y = 6, rule = B13/S2ik|B/S013-j
bo$o3$5bo$4bo!

[1and0nlycordershippr]

Glider-producing rep:

Code: Select all

x = 0, y = 0, rule = B2cen/S1|B2ce/S1
b2ob$o2bo$b2ob!

[Wngks Life]

I have been studying my new favorite rule for a long time. And these are different types of spaceships. All of these have 1G seeds.

Code: Select all

x = 50, y = 47, rule = B3/S234|B3/S2-a3
2o17bo5bo$bo17bo5bo$2o17bo5bo7$14b2o$15bo16b3o$14b2o2$44bo$44bo$35b2o
7bo$36bo$35b2o7bo$44bo$44bo3$40b2o$40b2o6b2o$48bo$48b2o15$41b2o$40bob
o$41bo2$35b2o9b2o$36bo9b2o$35b2o!

R-pentomino-shaped puffers come in a wide variety of types when facing each other. (Spaceships with different generations or those that do not face each other symmetrically were excluded due to the large number of types.)

Code: Select all

x = 66, y = 680, rule = B3/S234|B3/S2-a3
3o$o$2o6$2o$o$3o8$3o$o$2o8$2o$o$3o8$3o$o$2o9$2o$o$3o8$3o$o$2o10$2o$o$
3o8$3o$o$2o11$2o$o$3o8$3o$o$2o12$2o$o$3o8$3o$o$2o13$2o$o$3o8$3o$o$2o14$
2o$o$3o8$3o$o$2o15$2o$o$3o8$3o$o$2o16$2o$o$3o8$3o$o$2o17$2o$o$3o8$3o$
o$2o18$2o$o$3o8$3o$o$2o19$2o$o$3o6$4bo31b2o$2o3bo29bo2bo$o4bo19b2o9b2o
$2o3bo21b2o$2bo2bo22bo$2b3o9b3o10b2o2$14bobo35b2o$15bo33bo3bo$48bo5bo
$22b2o9b2o9b2o2bo4bo$12b2ob2o5b2o9b2o9b2o2b2o$12b2ob2o2$12b2ob2o$12b2o
b2o5b2o9b2o9b2o2b2o$22b2o9b2o9b2o2bo4bo$48bo5bo$15bo33bo3bo$14bobo35b
2o2$2b3o9b3o10b2o$2bo2bo22bo$2o3bo21b2o$o4bo19b2o9b2o$2o3bo29bo2bo$4b
o31b2o6$3o$o$2o21$2o$o$3o8$3o$o$2o22$2o$o$3o8$3o$o$2o23$2o$o$3o8$3o$o
$2o24$2o$o$3o8$3o$o$2o25$2o$o$3o8$3o$o$2o26$2o$o$3o8$3o$o$2o27$2o$o$3o
4$3b2o$bo4bo44b3o$o6bo$o$4o13b3o8b3o8b3o7bo4b2o5b3o$48bobo3bobo$9bo5b
o5bo15bo11bo5bo$8bo6bo5bo15bo$5bobo7bo5bo15bo$5b3o$17b3o$19bo14b2o$19b
o4bo7bo4bo$24bo7bo5bo$14bo4bo18bo$14bobo7bo7bo4b2o26bo$14bo7bobo7bo3b
o28bo$22bobo7bo3bo28bo2$22bobo7bo3bo28bo$14bo7bobo7bo3bo28bo$14bobo7b
o7bo4b2o26bo$14bo4bo18bo$24bo7bo5bo$19bo4bo7bo4bo$19bo14b2o$17b3o$5b3o
$5bobo7bo5bo15bo$8bo6bo5bo15bo$9bo5bo5bo15bo11bo5bo$48bobo3bobo$4o13b
3o8b3o8b3o7bo4b2o5b3o$o$o6bo$bo4bo44b3o$3b2o4$52bo$53b2o$3o47b2o$o2bo
46bo$o3bo13b3o8b3o21bo$bobo47bo$16bo5bo29bo$8bo7bo5bo$9bo6bo5bo$6bo2b
o35bo$6b3o9b3o29bo$18b2o29b2o$17b3o$28b3o$15bo5bo32bo$15bo5bo3b9o20bo
$15bo5bob2o3bobo3bo19bo2$28bobo$28bobo2$15bo5bob2o3bobo3bo19bo$15bo5b
o3b9o20bo$15bo5bo32bo$28b3o$17b3o$18b2o29b2o$6b3o9b3o29bo$6bo2bo35bo$
9bo6bo5bo$8bo7bo5bo$16bo5bo29bo$bobo47bo$o3bo13b3o8b3o21bo$o2bo46bo$3o
47b2o$53b2o$52bo!

Two blocks can push the two gliders one space forward. When attached with minimal spacing, the two gliders can reach speeds of 9c/16.

Code: Select all

x = 43, y = 15, rule = B3/S234|B3/S2-a3
2o$bo$2o4$2o$bo3b2o7b2o7b2o7b2o7b2o$2o3b2o7b2o7b2o7b2o7b2o4$2o3b2o7b2o
7b2o7b2o7b2o$bo3b2o7b2o7b2o7b2o7b2o$2o!

I used this to create this pattern. But I have no idea what pattern this is.

Code: Select all

x = 184, y = 95, rule = B3/S234|B3/S2-a3
38b3o$37bo3bo$37bo4bo$37b2o$39b3o4$157b3o$156bo3bo$155bo4bo$159b2o$156b
3o4$147bob3obo$37b2o108bo$37bo115bo$37b3o106bo4bo$146bo2bo$147b3o4$159b
2o$160bo$35b3o120b3o$35bo$35b2o2$136bobo$136b3o2$4bo31b2o98b3o13b2o26b
3o$2o3bo29bo2bo97bobo11bo2bo25bo3bo$o4bo19b2o9b2o106b3o31bo4bo$2o3bo21b
2o116b2o5b2o8b3o17b2o$2bo2bo22bo101bo14b2o32b3o$2b3o9b3o10b2o100bo30b
o5bo$160bo5bo$14bobo35b2o106b3o3bo6bo$15bo33bo3bo107bo2bo8bo$48bo5bo33b
2o74b2o8bobo$22b2o9b2o9b2o2bo4bo34bo55b2o9b2o3bo5bo7b3o$12b2ob2o5b2o9b
2o9b2o2b2o38b2o54b2o9b2o7bob2o$12b2ob2o147bo2$12b2ob2o147bo$12b2ob2o5b
2o9b2o9b2o2b2o38b2o54b2o9b2o7bob2o$22b2o9b2o9b2o2bo4bo34bo55b2o9b2o3b
o5bo7b3o$48bo5bo33b2o74b2o8bobo$15bo33bo3bo107bo2bo8bo$14bobo35b2o106b
3o3bo6bo$160bo5bo$2b3o9b3o10b2o100bo30bo5bo$2bo2bo22bo101bo14b2o32b3o
$2o3bo21b2o116b2o5b2o8b3o17b2o$o4bo19b2o9b2o106b3o31bo4bo$2o3bo29bo2b
o97bobo11bo2bo25bo3bo$4bo31b2o98b3o13b2o26b3o2$136b3o$136bobo2$35b2o$
35bo$35b3o120b3o$160bo$159b2o4$147b3o$146bo2bo$37b3o106bo4bo$37bo115b
o$37b2o108bo$147bob3obo4$156b3o$159b2o$155bo4bo$156bo3bo$157b3o4$39b3o
$37b2o$37bo4bo$37bo3bo$38b3o!

To become Sawtooth, the backrake must act as a glider gun, and if the glider is destroyed, a spaceship must be created to remove it in the opposite direction. For the moving Sawtooth, the backrake should go left, and it should generate a glider when a block is incoming.

Breeders.

Code: Select all

x = 87, y = 543, rule = B3/S234|B3/S2-a3
7b3o$7bo$7b2o16$8b3o$8bo2bo2$9b3o4$bo$o$o$2o$5bo$2b3o87$7b3o$7bo$7b2o
3$75b3o$74bo2bo$19bo54bo$18bobo$75bo$17b2obobo10b2o37bobo$17b2obo2bo10b
o2bobo$16bo3bo3bo8bo3bo2bo$17bo5bo13bobo$18bo3bo61b3o$8b3o71b2o2bo$8b
o2bo8b2o60bo2b2o$82b3o$9b3o$19bobobo$18b3ob3o23bo$18bo5bo22bo2bo4bo$b
o45bo2bo3b2o$o19b3o8b3o8b3o2b3o5bo3b3o$o$2o$5bo$2b3o86$30b3o$29bo2bo$
32bo$12b3o14bobo$12bo17bo$12b2o$24b2o$24bo$24bo2bo$25b2o2$19b3o$18bo2b
o$21bo$18bobo$8b3o9b2o$8bo2bo9b2o$20bo2bo$9b3o9bob2o$18bo$18bo4b2o$18b
o5bo$bo$o19b3o$o$2o$5bo$2b3o120$11b3o$11bo$11b2o8$32bo$31bobo$8b3o21b
o$8bo2bo9b2o$21bobo$9b3o11b2o$18bo$18bo4b2o7b3o$18bo5bo$bo28bo5bo$o19b
3o7bo5bo$o29bo5bo$2o$5bo26b3o$2b3o102$11b3o$11bo$11b2o$32b3o$31bo2bo$
34bo$29bo4bo$28bo5bo$28bo4b2o$28bob3o$29bo13bo$42bobo$8b3o32bo$8bo2bo
9b2o$21bobo$9b3o11b2o$18bo$18bo4b2o7b3o8b3o$18bo5bo$bo28bo5bo$o19b3o7b
o5bo$o29bo5bo$2o44b3o$5bo26b3o10bo2bo$2b3o40bo3bo$45b4o$47bo$32b3o$32b
o2bo2$33b3o10bo$40b2o$40bo2bo3bo$40bo7bo$25bo15b2o4bo$24bo19b2o$24bo$
24b2o$29bo$26b3o!

[NNlk05]

Rule with common puffers and a very common 4c/8d:

Code: Select all

x = 64, y = 64, rule = B2a/S234|B3/S23
2b4o2bobobobo3bo2bo3bob2o3b2ob2o2b2o3bobob2o4b3obob2obo$3ob3ob2o2bobo
bobobo2bo2bo2b2o3bob2obobobo3b3o3bob4ob3o$3o2b6obobo4b2ob2o5bo2bobo2b
2o3bob3o2bo2b2o3bo2bobo$o2bobo3bob2o3b2o2bobo2b3obo3bo4b2ob8ob2o3bo4b
3o$o2b2o4b3obob2o2bobo7bo3b2o3b3obob3obob6ob4o$b2obo3bobo3b2o4bob2obo
3bo3bo2bo7bob6ob5o2b3o$2bo8b4o2b4ob2o3b2ob3obo2b2o3b7o4b4o3b2o$4o2b3o
b2o2b3o2b8o2b2ob2ob2ob2ob2o2b2o3b2o3bobob2o$bo2b3o3b2o2b2o4bobob3o2bo
6bobob5o2bo2b10obobo$2ob2o3bo2bo2b2o2bo2b2obo2bob5ob3o5b2o3b2obo4bo2b
ob3o$3o6bo2b2o2b6ob2ob5obobobob2o6bobo9b2ob3o$bobo2b3ob3o2b2obobob2o2b
ob4o2b3o7b4o2bob4o4b2obo$b2o3b3ob2ob3ob3obo2b5obo3b2ob3ob3obo2b3o2bo3b
o3b3o$4o2b2obo2b4obo2bobo6b3o2bobo2bo3bobo2bo5b5o4bo$3obob4ob3o4bob2o
3b3obo4b2o2b2obob7o2bob4o2b3o$b5o2bo2bobob3o2b2ob2o2bobob6o5bo2b3o2b2o
b2o3b6o$3bob2ob6obo5bo3bobob2ob3o3b2obob4o2b4ob6o$o3b2o2b4ob3obo2b3o4b
o3b2obo3b2obobob3o2bo3bob3ob4o$4bob2obob2o2b2obo2bo4b3o2b2ob2o9bobo3b
2o3bo2b4o$2b2o3b6o7bo3bob6obo2b2o3b3o3bo4b2o2bobobo2bo$b2obo3bo2bobob
o2bobo2b2o4b11o4bo3bo2b2o6bo2bo$3o2b2obo2b2o2b2o4bo5bob2obo3bo2bo2b2o
3bob6obobobo2bo$2ob2obobobobobo4bob2o2bob3obo3bobo2b2obo4b3o3b9o$b2o2b
o2b4o2bo3b2ob4o4bobobob4obo2b2o4bobo4b3obob2o$5o2bob3ob6ob2o2bob2o2bo
2b4o2bobob2obo2bob2ob2obob2obo$2obo2bob4o2bobo3bob2obob2o5bobo5b3o2bo
bobob3obo2b3o$3bob8ob2o4bobob2ob4o2b2ob2ob5o4bob2ob7ob2o$2bo2bo2b2o2b
3o2bobo5bobo2bob2o2b3o3b3o2bo6b2obo2bobo$10ob2o4b2o4bo3bo4b2ob3o3b3o2b
3ob3o2bob2obobo$b4ob6ob3o2bobobo4b2o2b3o3b2o2b3o4bo4bob2ob2obobo$3o2b
5o2bo2b4obobob2o3bobobob2o2b4obob3o2bo7b2o$b2obo2bo3b3o3bobo2b8obo3bo
b2obo2bo3b9ob2obo$3b3obob2o2bo2bob2o3b2obo3bo3b2obobobo2bobo2bob3o2bo
3b2o$ob2o2bo2bo2b3obo2b9obo4bo3b3o2bo2b5o2bo2bo3bo2bo$2b2o3b3o3bo2b3o
bo2b2obo3b2o5b2obob3o2bobo3b2obo2b2o$b5obob2o4b2obobobo2b4o2b2obo7b3o
b2o2b4obob3obobo$bobobob3obo2bo2b2o4bo2bo6bob3o3b2o2b5obo3bo3bo2b2o$b
3o2bobo2bo2b4ob3ob2o2bo2bo6bobobo5bo2b4obobobobobo$bo2b2o3bo2bo2b5o3b
o3bo2bob2obob2obo2bo3b2obob2o2bob4obo$3obobob5obobob2o5bob2o2b4o2b2o2b
o2bobo2b3ob3o2bo2bobo$2o2b3o4b2o4b2obob2obo2b3ob4ob3obob3o2b2obobo4b3o
b2o$2obo7b2o2b4o3bobobobo7bo2b2ob3o8b8o$2b2o4bo3b3obo2b4o2bo2bo2b2o2b
2o2bob4ob3o2b5o3bobo$o5b2o2b2obo6b5o4bo2b2o2b2ob2o4b2o3bob5o2bo2bo$3o
2b3ob3o2bob2ob2obo3b3obob2o2bob2o2b3ob2ob6ob4ob3o$2bob2obo4bo3bob2o2b
obo2bobo2b3ob2obob3o2b2obo3b4obo2b3o$3b2o2bob2o2b5obo6bobob2o2bo2bobo
b2ob4o5bo6b2obo$4ob3ob3o2b5o3bobob2ob4o3bob2obobo3b2o4bobo2b2obobo$ob
o2bo2bo2b4o7b2o2bob2o2b2obo3bobobo7bob2o5b2o$2bo4bo3bobobo2b3ob3obob2o
bobob2o2bobo2b2obo2bob3obo3bo$3o2bob3o4b2o3bobob2ob4obo2b2o3bo3bob2o2b
o3b2o3b3o2bo$obob3o2bob2o3b2ob2o2b2o5bobo3bo4b2obo5bobobob2o5bo$2bobo
4b3obobob2ob3o2bobobob4o4bob2ob2o4b3o2b3ob5o$b7o2b2o2b3obobo2b3obob2o
2b2ob3o3bobo3b4o2bob4obo$5bobobo5b2obobo3bo3b2ob2o10b3ob3o2b3obo2bob3o
$2b2o2b3obobo3bo2bobo2b2o2bob2ob2obo3b3o2bo2b4o2b3obob4o$2ob3obob2obo
bob2obo2bo3bo5b2obo4b2obob4o4b3o3b3o$2o8b6o4b5ob3o2bobo3b2ob2obo2bo3b
2obo3b3ob3o$ob3ob4obo4bobobo2b2o4b3o2b2ob4o6b3o4b3o2b2o$2bobobob4obob
ob3o3b2o6bob5obob2ob2o2bo2b2ob2obo2bob2o$obobob2o2b4o3b4obob2obo2b2ob
2o2b2o2b2obo2bo2b6obob3obo$5bob2ob3ob5ob3o2b2ob4ob2o2b3o2bobobo2bo5b2o
2bo$2b2o2bob2obobobo2b2o2b2obobob3ob2obob3o2b2ob3o2b2o5bob4o$ob3ob2o3b
7obobo3bob8o2bo3bob4obo2bo4b3o2bobo!

[ababa11e]

I don't even know HOW to describe this one, just play it:

Code: Select all

x = 64, y = 64, rule = B1e2i/S|B/S01
2o2bo3bo4b2obob2ob2obo2b3ob2obob2o2b2o2b4o2bo3bobo$o3bo2bo2b5obob2o5b
ob4o2bo2b3o2b3o2bobob2ob2obo2b3o$bo3b3obob2o2bo3bo2b4o2b2ob2o3b7o2bo2b
o2bo2b2ob2o2bo$6o3bob3ob2o2bob5o2b2o2b2obo5bo2b3o3b3ob7o2bo$6o5b2o3b5o
bobo3bo4b2o2bobob2ob3ob3obo4bo3bobo$4ob3o3b2ob2ob3ob2ob2obo2bob3o5bo2b
o5bobob5o4b2o$2o2b3ob4ob2ob2o3b2ob2o5bo3bo2bo2bob4ob3obobob2o2b2o$ob2o
bo2b2o2b4o3bob4o2bob9ob3obo2b6o3b4o3bo$b3ob4o2bobo2bob4o8b2o3b2o2b2ob
ob3obobo3b6o3bo$bob3o2bo2bob3obob4obobobo2bo2b2o3b2o9b5ob3ob4o$bo2b6o
bob2obob2obob2o3b2o3b2ob4ob3o2bo3bob2o2b3o2bo$2b3obob3o3bo7bob2o2b4ob
o2bo2bo2bo5b3o3bob2o$ob2o6bo4b2o4b2o4bo3bobobobob2obo4bo3b2obo2b2o3b2o
$bobo2bob4ob3ob2obobo2bob4o3b4o5b2obobobo3b5obob2o$o2bo2bo2b4o2bo3b2o
bo3bo2b4o3b2o2bobo3b2obo2b2o2bo2b3o$2o3b2ob3o3bo4bobob2o3bo3bo2b3o2b2o
2b5o3bob5obo$3b5ob2o7bobob2ob2ob3o4bob2o3bob2ob2ob2o2b3obob2obo$o4bob
2o3b2o2bo3bobobobo4b5o2b2obo2b3obo5bo2bo4bo$2bobo3b3ob2o2bo5bobob2o3b
o2bobobobo5b3o4b2o3bo2bo$2b7o2b4obob3obob2o2b2o2bo2b3o2b2obob3ob2o2b3o
3b2o$5o3b3o6b9obo2b4ob2ob2o2bo3b3o3b4o2b2obobo$ob2obob5o11bo2b2o3bobo
bo2b3ob2o3b2o3bo4b5o$3b3obob2ob3ob3obo2bob6o2bobo2bo2b3o2b8ob3o4bo$10b
3ob2o2bobo5b2o2bobob2ob5obo2b2ob2o2b2ob4obobo$bo4bo3b2o2b2o3b4ob2ob2o
bo4b2o2b2obo3b3o2b2obo2b2ob2o$2o3bob2ob2o5b2ob5o3b2o2bobob4obo3bobob7o
bobobobo$2b2obob2obo2bobob3o2bo2bobo2b2o5b2o4bo2bo2b6obobo3b2o$2bobo4b
obo9bo4b3o5b2o3b3obobobo3bob2ob3ob3o$3o2bobobob4obo5b4obob3obo3bob2ob
o2bo2b2o2b3obob2o$2b4ob2o4bo5bobo2bob5o7b2obo5bo2bo2b2o2b3obobo$3ob3o
b2obo3bobob2o4b3obo3b4ob4o2b4o3bo2bob3o$2b3o2bob2ob6obob2ob6obo2b5o2b
o2b3obobo2b4ob4obo$o2bob3ob2obo2bobo4bo4b4obob2ob3o4bo2bo2bo5b5o$bo2b
2o2b2obo3b5ob5obo3b6obo2bo2bo3bo2bobobo3b2obo$bob3obob2o2b2o2bo3b8o2b
obo2bob2o2bob3ob2obob2o4bo$4bo4b2obo2bo3b2ob5obob4obo2b2ob3ob4o2b3o2b
o2b2o2bo$b3obo3b2o7b2obob2o2b2ob2o2bob2obob2ob5obob3o2bo2b2obo$bo3b2o
bo8bo2b2ob3o4bo2b6ob2o4b2o2b2o3b2o3bo2bo$3b2o3b3obo2b2obo2b2obo2b2o2b
obo3b2obob2o2b2ob5o2bob2o2b2o$3ob2ob3o4bo7b2o2b3obo2b2obo3bob2obo2b3o
2b2obob3ob2o$obo2bobo2b4obob3o2bo5b4ob2obob2ob2ob2o2bo3b3ob5o$ob2ob3o
bobo4bob3o2b2o2bo2bobo2bo5bo4b4o2b2obo2b3obo$4bo6b4ob3obobobo2b3ob2o2b
o3bobo3b2o2bo4bo2b2ob2obo$2b4o4bo2b4obo2b3obo4b2o3b3o4bobo2b2o2b3o3bo
b2o2bo$ob7o2b4ob3o3b3o2bo5b2o3bo3bob2o4bo4bobo2bobo$bob2o2b6ob4ob4obo
b6o2bobo2b2o3b6ob2o4bo2bobo$2b3o2b5o4b5ob2obo3b2o2b3o2b2ob5o4b3o2bo2b
2ob3o$o2b5o2b3o5bo3bo10b3ob3o2b2ob4ob3obo2bo2bo2bo$b4ob2o2b2o4b6ob2o4b
13ob2o2bob3o2b2o2b3obo$2b2obobo2b3o3bo3b2obo3b2o2b2o7bo2b5o3b2ob2obob
ob2o$2o2b2o2b2o2bo3b2o4b4o3b3obo5bob3o3bo2bob2o4bo2b2o$b2o2bo3b2o2bo2b
ob4o8bo3bo2b3o3bob4ob3ob3ob3o2bo$b3ob2o3b3obo5bo2bo3b2o4bo2bo6b2o3bob
obo3bob4o$bobob4o2b2ob4ob2o7bobo3bo2bob2o4b2obo5b3o2bo3bo$3bo4b3o2b2o
2b4o3b3ob2ob3o2b4obo4b3o4bob2ob3o$bobob3o4bo2bobob3ob2o2bob2obob2o4bo
2bobo3bo3bo2bo2bobo$2bo2bo3b3o2b2ob3o3bobobob4obob2o2bo2b2o2bo2bo2bo6b
2o$2o3bo6bob3obob2o3bobo2bo2bo3bob2o2b2o3b3o5bo2b5o$2b3o3b2obo2bo2bo4b
2ob3o4b2obob2o2b2ob4o2bob2o3b2obo$obo2b6o2b2o2bo2bo2b3o2b4obo3b2ob2ob
4o3b5obo2bobobo$b2o2b3o3bobo3b3o5bo7bobo2bobobo7bob4o2bo3bo$2b2o2b3o2b
ob3obob3obobo2b2o5bobobo7b6o3b2ob3obo$3b4ob4ob2o2bobo3b2o3bo3bo2bo2b2o
2b2o2b2o4bobobo2bo2bo$ob2obobobo2b3o2b5o2bob2obo2bob5ob2o4bob2obob2o2b
5o!

It forms these expandign replicator highways almost, that form these expand triangular defects in them, that refill?

I dunnoo, but it seems cool.

Kind of explosive? Well, if you pay attention, the patterns in the traingles repeat, some moving, some not, so it's sort of doing something else.

The highways seem to grow via replicators latching onto the sides and moving up. Also, in the bottom, there's a highway envoled by highways of a different grain that don't merge.