Is there anybody who can make a oval wall for me so I can make a oval race track. I can give you the info like how big it has to be. I don't know how to make it with blender.
The simplest method would be to create a meshroad of 1m height and 0.3m width around the oval. Then when your done plotting points, use the position type-in to raise it 0.5m so its at ground level.