  In 1935, Whitney constructed a smooth function for which the Morse-Sard
Theorem does not hold. Whitney's construction is closely related to certain
compact connected set, which is called Whitney set now. From then on, there are
a lot of works on Whitney sets. In this paper, we use IFS with condensation, a
notion introduced by Barnsley and Demko in 1985, to construct Whitney arcs and
Whitney sets. Our construction includes most early results as special cases.
