This is is easy to overlook even if you get the code from the hint.
First step, take a look at the hint.
This is where doing some research on Google comes into play.
If you have done hands-on 3D design and printing (and NOT tinkercad), you should have an idea of the language used. If not, using a Google search should help.
Next, what can you do with this code? An online viewer for this code might help. There are several ones out there. Some work better than others.
Next, you need to obtain the code from pico. The information needed to get that code is given to you in the challenge instructions.
Load the code into a viewer and thoroughly explore the results both near and far.