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First try with BrowserSynth and the browser port of Eisenscript
simple script:
6 * { ry 60 } r
rule r md 22 {
{x 2}sphere
{ ry 12 rx 12 rz 22 x 1 z -0.4 y -0.4 s 1.1 0.8 1.2} r
}
rule r md 22 {
{z 2 s 0.5}torus
{ ry 22 rx 22 rz 12 x 1 z -0.4 y -0.4 s 0.8 0.8 1.1} r
}

So you can squash spheres and use other primitives like torus and so on.
Scripts so far work a bit different from the eisen script in Structure synth but it is certainly a start
live demo here - zoom with mousewheel, rotate left click and shift right click.
https://playingwithstuff.000webhostapp.com/play2/

Project is hosted on GitHub here at https://github.com/after12am/eisenscript