Customizable Spiral Bed Test

I made this customizable spiral bed test because I tried to naively scale up another bed test that I liked for a bigger print bed and didn't realize that would also affect the line widths of the spiral. I made this in hopes to save someone else some 3D modeling time to make a bed test that fits how they want without needing to scale another model. This scad file can be opened with OpenSCAD if you want to customize the STL on your machine locally or you should be able to use the Customizer App on this model here in Thingiverse to generate you own STL model. (I will test this out and add the link and steps here once I upload this model)

####Parameters at the top of the scad file
###`nozzle_mm = .4;`
Nozzle diameter in millimeters. Minimum value of 0.01 for code to work
###`bed_x_mm = 250;`
Absolute size of the x dimension of your print bed in millimeters. Minimum value of 10 for code to work
###`bed_y_mm = 250;`
Absolute size of the y dimension of your print bed in millimeters. Minimum