  In this work we compute the color fields in the mediator plane between a
static quark and a static antiquark using quenched lattice QCD. In special, we
see the effect of the quark-antiquark distance on the flux tube. To obtain this
results an improved multihit technique is developed and an extend smearing
technique is used. Then, we also discuss the flux-tubes in a system composed of
two quarks and two antiquarks. The ground and first excited states fields are
studied for different dispositions of the system.
