Molecules Vs Compound chemistry?

Molecule and compounds differ because a Molecule is a made up of two or more elements/atoms that have a COVALENT bond...and also that a molecule can be like 02 oxygen molecule it is made of the same element so in a pure substance i guess?....where as a compound is chemical bonding between two or more elements/atoms and differs from a molecule because cannot be like a pure oxygen? 02...is this right?

Additional Details

so molecule is basically made up of tow or more elements that share electrons