Op-Art Beverage Coaster Puzzle

A large coaster that can also be used as four small coasters.
For a two-color result, the filament must be changed during printing.

The base plate has a height of 2mm, then followed by the decoration with a height of 0.5mm.
With a layer thickness of 0.25mm, the filament change must take place immediately before layer 9.
I have modified the GCode in the corresponding line and inserted the following commands there.

;LAYER:8
G0 X50.3 Y74.044 Z2.25 ; first command for layer 9