Hello friends,
this extension is about drawing a dynamic graph, which scrolls to the left.

in this post we have a code to draw a dynamic graph:
Redirecting to Google Groups 
In this topic I simplified that code and made several examples:
Dynamic graph. Sinusoidal wave. Shift left graph 
Now this extension performs the same effect.
Blocks:

You can download the extension from:
App Inventor. Extensión. Dibujar un gráfico dinámico. 
Updated 2022/09/17