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2019-08-13 20:37 nesdori  
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i'm using this cave to introduce new moving fly formations not previously mentioned in  Arno 's list. i'll update this cave each time i found a new formation.  
  
the first one is 4b+1f going down-left. the formation of bflies is the same as in 4b down-left. there's just an addiotional ffly. the group can't be split into to two moving groups so it basically is a single group. bflies never realize that someone is traveling with them because bflys never check the position where ffly is. so ffly is basically traveling as a stowaway :)

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2019-08-13 20:45 nesdori  
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all formations will be with closed borders, i won't check for new formations enabled by open borders.

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2019-08-13 21:06 Arno  
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well spotted! great! :-)

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2019-08-13 21:42 nesdori  
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the next formation is 5b going up-right. again this group can't be split into two separate moving groups. this time there are no stowaways and all bflies interact with each other so this a new formation.  
  
I have been studying diagonal directions and especially up-left and down-right because no group has been found to move in those directions. So far I have had no luck. It seems that those directions are impossible or the group needed is something very complex.

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2019-08-13 22:40 shredder  
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awesome! and good idea with packing this formations into one demo cave:)

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2019-08-14 18:22 nesdori  
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the next group is interesting. the group is 6F going down. i found it accidentally when I tried to construct a group going down-right. the cycle length is whopping 18 frames! (there are 18 different states in formation). the group advances down two steps during a cycle so it advances one step / 9 frames. it's the slowest moving group found so far ( Arno , correct me if i'm wrong :) because of many different states and slow motion it looks like an animated spinning disc. i got another story-cave idea where i'll use it later; it will be arcade game style :)  
  
i tracked movements of each separate fly and i noticed that there are two role groups which each have 3 flies. the flies within role group will change places during a cycle so that role cycle is 1 -&gt; 2 -&gt; 3 -&gt; 1. after 3 full cycles (3*18 = 54 frames) all flies are back on their initial position.  
  
if there exists a formation going up-left or down-right it will probably be something like this and the group will have a long cycle length. it may not move directly to up-left or down-right but may for example go two steps down and one step right during a cycle move to down-down-right rather than down-right.

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2019-08-14 18:43 trischi83  
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;-) ) )  
  
\\\\\\\  
  
:-) ) )

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2019-08-14 20:05 Arno  
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very interesting! :-)   
  
18 frames (or 9 per step) is indeed a new record. the slowest i knew before was a set of 5 ff going down (visible in  Arno  833), which has 8 frames per loop.  
  
also intriguing that this set is made of 2 subgroups "working" together, probably a new phenomenon as well.  
  
your 5 bf up-right reminds me of the existing 4 bf up-right, which has also 7 frames per loop. i wonder if these 2 formations are somehow related.  
  
anyway, i have to update my list! :-D