\pstGeonode[PosAngle={-135,80,0}](-1,0){B}(3,-1){C}(-.9,.5){O}(0,2){A}
\pstGeonode(-2,3){I}
\pstCircleOA[linecolor=red]{O}{A}
\pstInterLC[PosAngle=-80]{C}{B}{O}{A}{D}{E}
\pstInterLC[PosAngleB=60, Radius=\pstDistAB{O}{D}]
  {I}{C}{O}{}{F}{G}
\pstInterLC[PosAngleB=180, DistCoef=1.3,
  Diameter=\pstDistAB{O}{D}]
  {I}{B}{O}{}{H}{J}
\pstCircleOA[linecolor=red, DistCoef=1.3,
  Diameter=\pstDistAB{O}{D}]{O}{}
\psset{nodesep=-1}
\pstLineAB[linecolor=green]{E}{C}
\pstLineAB[linecolor=cyan]{I}{C}
\pstLineAB[linecolor=magenta]{J}{I}
