Image 1:

intersection
{ cylinder { -x,x,1 }
  cylinder { -y,y,1 }
  cylinder { -z,z,1 }
  cylinder { <-1,-1,-1>< 1, 1, 1>,1 }
  cylinder { < 1,-1,-1><-1, 1, 1>,1 }
  cylinder { <-1, 1,-1>< 1,-1, 1>,1 }
  cylinder { < 1, 1,-1><-1,-1, 1>,1 }
}

  Image 2:

union
{ #declare Angle=0;
  #while(Angle<360)
    torus { 1,.05 rotate z*45 translate -x*.3 rotate y*Angle }
    #declare Angle=Angle+30;
  #end
}

  Image 3:

union
{ #declare Angle=0;
  #while(Angle<360)
    union
    { cylinder { <0,-1,-.75>, <.75,1,.5>, .025 }
      cylinder { <0,-1,-.75>, <-.75,1,.5>, .025 }
      rotate y*Angle
    }
    #declare Angle=Angle+10;
  #end
  torus { .75, .025 translate -y }
  torus { vlength(<.75,0,.5>), .025 translate y }
}


-- 
main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
):5;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/

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