When can be a better moment to code a script about the rain when it is raining outside?

I wrote rain.sh to make it rain inside! The following animated GIF was just a teaser, you can watch a 1-minute clip on YouTube.

https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjcdA7FJhUs3nHiuAtw7MMfiOS4d1NUtXrquPDh7RGlOxI9bjgRDsOIwGEUyWGD3xIF-X1iA8Pm2GSlPML7k5rR_OGUno4lU6sx7HRNemKDlO5DGX5rhsWkat4y18g3IQdHngwBSOj-R8c/s800/rain.sh.gif

The code was modified from a falling hearts script, I turned hearts into rain drops!