The March of the Blobby Aliens

First they find a place for their nest , usually under the roof of some big empty industrial building
then they expand and grow
...And when all layers of Aliens are sufficiently expanded then start the March of the Blobby Aliens

see as sequence
[link]

M£D my parameters (NB final image was flipped upside down )

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................................qgzIJYDfqz1........Y./..................i.2..MFF
.................M.4/....6kY6...p.....E0.....srUSWTCEGnD/.........US1dkpXm1.AviL
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..EIbyoPxJHEGdZ9....cQ0.DR7.0c..mN5S..UkKZMxkayj0YqulQA8Sz1...........k.8.kYjd2.
.A72QifFDzn/H0/bvOonz8...........6U0.YnFP/..fjrwdvgqzs/Fbf24LNyD..........E6Gc..
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E....I....k.....2....A....EEh3aSdtqNU6oPs/UQ..........................k/9.......
..................L../.......czjTIsuFVf59.2.....................................
................................................................................
..........................kzzzzz......kEZl4RdBKHjFKN............................
..............................zj..........EnAnAnAngyz0.......UzD................
................................................................................
.....................................wzzzzD......IaPbJaQo.EM..kN.A3.............
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...sz...........................................................................
................................................zzzzz1......0x4SBx4N934Pd/kI.21.
......................k/C..........................yzAnAnAnAnAyD........Uz1.....
...sz.........yD................................................................
.....................................................61...U/....1....MoPgFKOiR46
7t4RU.pPr/......................8..0...........................E........t.A.....
..E9./........zD................................................................
...................................................../....E/....}