# Custom Script

The following workflow allows to run any OpenSees tcl script within Grasshopper.

<figure><img src="https://raw.githubusercontent.com/Alpaca4d/alpaca4d.github.io/refs/heads/main/doc/examples/custom-script/custom-script.png" alt=""><figcaption></figcaption></figure>

[custom-code](https://raw.githubusercontent.com/Alpaca4d/alpaca4d.github.io/main/doc/examples/custom-script/custom-script.gh)

You can use this setup as a starting point whenever you need an OpenSees feature that is not yet wrapped by Alpaca4d components.\
Simply replace the example `.tcl` content with your own script and keep the same I/O structure to run and post‑process results directly in Grasshopper.