#ifndef (Axis_R)
    #declare Axis_R = 0.1;
  #end
  #ifndef (Axis_L)
    #declare Axis_L = 10000;
  #end
  cylinder { <-Axis_L, 0, 0>, <Axis_L, 0, 0>, Axis_R pigment { color rgb <1, 0, 0> } no_shadow}
  cylinder { <0, -Axis_L, 0>, <0, Axis_L, 0>, Axis_R pigment { color rgb <0, 1, 0> } no_shadow}
  cylinder { <0, 0, -Axis_L>, <0, 0, Axis_L>, Axis_R pigment { color rgb <0, 0, 1> } no_shadow}