Animated time series

using AbstractPlotting

f0 = 1/2; fs = 100;
winsec = 4; hopsec = 1/60
nwin = round(Integer, winsec*fs)
nhop = round(Integer, hopsec*fs)
# do the loop
frame_start = -winsec
frame_time = collect((0:(nwin-1)) * (1/fs))
aframe = sin.(2*pi*f0.*(frame_start .+ frame_time))
scene = lines(frame_start .+ frame_time, aframe)
center!(scene)
lineplot = scene[end]
fix = 0
record(scene, "output.mp4", 1:50) do i
    global frame_start
    aframe .= sin.(2*pi*f0.*(frame_start .+ frame_time))
    # append!(aframe, randn(nhop)); deleteat!(aframe, 1:nhop)
    lineplot[1] = frame_start .+ frame_time
    lineplot[2] = aframe
    AbstractPlotting.update_limits!(scene)
    AbstractPlotting.update!(scene)
    sleep(hopsec)
    frame_start += hopsec
end