What arrangement of electrons would result in a nonpolar molecule?

The arrangement of electrons which would result in a non-polar molecule is that,

 electrons would have evenly distributed.

A molecule can be non-polar when there is an equal sharing of electrons which is between the two atoms of a diatomic molecule or reason being the symmetrical arrangement of polar bonds into a more complex bond.

Not all atoms attract electrons with the same force.

Where’s the selection?