[jonahx]

Translated into J:

    w=. 120
    row=. [: (' *' {~ ] > 10 %~ >./) [: (1 #. i.@w =/ ]) [: <. w * (* ] * -.@])^:(<200)&0.5
    echo (row"0) 2.4 + 1.6r100 * i.101

Live:

https://tio.run/##HYzBCoJAFEX3fsWhKGcmer4n1UJU/I@YNhFkG8GNi8...