Galaxy Tweet

A galaxy simulation inspired by https://en.wikipedia.org/wiki/Density_wave_theory.

Remix it on pico-8-edu.com

This cart is tweetable at just 277 characters.

::_::
cls()
srand()
for i = 1, 100 do
    pset(rnd(128),rnd(128),7)
end
for i = 1, 1800 do
    r=rnd(50)
    p=r/30
    a=rnd() - t()/(2+r*r/50)
    x = r*cos(a)
    y = r *1.3 * sin(a)
    pset(64 + x * cos(p) - y*sin(p), 64 + x * sin(p) + y * cos(p), rnd({7,7,7,7,7,7,7,15,10}))
end
flip()
goto _

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Source code available on GitHub