#declare achse =  

 cylinder {
       <-5,0,0>, <5,0,0>, 0.1
      }             
   
                                                                   
                   
object { achse pigment {color Red} }                   
object { achse pigment {color Green} rotate <0,-90,0>}     
object { achse pigment {color Blue} rotate <0,0,90> }