Any App or Software to learn CNC G-code and show trial run on screen ? + robotics !

[oldcarguy]

Hello

 

I am looking for a Windows program or Android - IOS app that can teach me CNC - G code programming ,

I  do not really want to do 1000s of lines of code , but I would like to know how it works ,

 

simple stuff at first, and then show me on the screen as it "cuts" the design I made ,

 

I would get a simple design file off the Net . modify it some and then see if that works,

 

then I could have it CNC machined or 3D printed ,

 

I would also like to learn some things  about small robots or even just a robot arm and how to make it move where I want ,

 

are there any programs for kids - teenagers that I could start with and work up from ?

 

Any websites or Youtube videos that start simple would help ,

 

Thanks for your ideas ,

 

 

[johng]

G96 S4000 M03
G00 Z-500
Chuck and tooling fly almost through the safety door....oooops