hey picture man what do you mean by making it if you mean the modeling i can help you but if your trying code then i don't know.
Here it my latest model of the road flare
Flat shade it.
Assuming your using Blender, which it looks like you are, you don't need to worry about flat shading, it will by default. Just DON'T press the set smooth button. If you do, click to set solid button to flat shade it again.
Also, do you even know how to export it and stuff?