Add this following line to the "Additional Board Manager URLs",

https://github.com/ambiot/ambd_arduino/raw/master/Arduino_package/package_realtek.com_amebad_index.json

Then install Ameba D package from the board manager

Use Arduino IDE to upload the code attached here to Ameba

Use link in the description to print it out, if you position the part carefully, you don't need any support at all

Here is my printing settings:

resolution: 0.2

infill: 20%

material: PLA

adhesion: brim

support: no