TinkerCad & Blender

In TinkerCad I had attempted to create a 3D model of a car

In TinkerCad's Codeblock template I have created very basic code to scale a smoothed rectangle

Using Blender for the first time, I had been messing around trying to get use to it. So what ended up being created from that is the default Cube with a never ending rectangle that can be used as a stage and a small stroke that is in the same color from me not understanding the process.