### Animation doesn't work

I'm using a tutorial and should get an animation from this, but nada. All I get is the title: Animation with 20 frames, and nothing else. Is this correct or did the author miss something? I've waited ten minutes and my computer isn't That slow ;) Midrange Acer with four ~~cores.~~cores. I also tried it in Firefox as well as Chrome. No change.

```
f(x) = 5*x - x^2/8 + x^3/1200
df(x) = diff(f(x),x)
max = 100
p = plot(f(x),x,0,max)
lblp = text("$y = " + latex(f(x)) + "$",[40,100],fontsize=14)
lbldp = text("$y' = " + latex(df(x)) + "$",[40,80],fontsize=14,rgbcolor='#006000')
ga = []
for argx in srange(0,max,5):
dp = plot(f(argx) + (df(argx)*(x-argx)),x,0,max,color="#006000")
xp = point((argx,f(argx)),rgbcolor='#800000')
ga.append(p+lblp+lbldp+dp+xp)
animate(ga,ymin=0,ymax=max,axes_labels=['x','y'],fontsize=12,figsize=(4,3)).show(delay=1)
```