在数控系统中，机加工的自动化是以零件的程序设计为中心的，根据既定程序，控制机床的位置和速度。 -In the computer numerical control (CNC), the automation of machining operation centers on parts " programs . The CNC unit depends on program to control the machines " position and speed

Recusive Drawing for a star, it depends on the angle between the edged of the star, also the user sets to witch level he wants the star to be recusivly drawn.