There are lots of examples of somewhat complex animation in the examples/animations folder in the coldtype repository, but here are some simpler (and shorter) ones, that demonstrate the fundamentals of how animations are built in coldtype.

A circle moving

@animation((540, 540), timeline=60, bg=1, render_show=1)
def circle(f):
    return (P().oval(f.a.r.inset(120)
        .offset(f.e("eei", 1, rng=(-f.a.r.w/2, f.a.r.w/2)), 0))

A letter flying

@animation((540, 540), bg=0, timeline=24, render_show=1)
def flying(f):
    return P(
            .f(hsl(f.e("qeio", 0))),
        StSt("A", Font.MutatorSans(),
            50, wght=0.2)
            .scale(f.e("eei", 0, rng=(1, 120)))
            .rotate(f.e("qeio", 0, rng=(0, 360)))

Simple variation

@animation((1080, 540), timeline=50, bg=hsl(0.4), render_show=True)
def vari(f):
    return (StSt("CDELOPTY",
        Font.ColdtypeObviously(), 200,
        wdth=f.e("eeio", 1))

A variable wave

@animation((1080, 540), timeline=50, bg=hsl(0.6), render_show=1)
def wave(f):
    return (Glyphwise("COLDTYPE", lambda g:
        Style(Font.ColdtypeObviously(), 200,
              wdth=f.adj(-g.i*3).e("seio", 1)))

Note on running Coldtype locally

To generate a full set of frames for a coldtype animation on your local computer (as opposed to here on Colab), hit the a key in the viewer app — once you do, you should see the command line prompt printing out a bunch of information about frames being rendered. (Also, once you do that, you can hit shift+space to preview the animation in real time at the correct frame rate, using the cached frames.)