Warning! I'm not a "Advanced User" I just play one on the home computer.

If I gather this right, sounds like you need a sin cos type thing for
the translation (one for x and one for y). However, why not just rotate
-clock*180*z while moving 1*x and use a math function on the scale y.
Without trying it out I don't know exactly what this would be.

sphere {
    <0,0,0>,1
    scale <0.25,H,0.25> //H increases/decreases to keep touch with floor
    translate <-0.5,0,0>
   rotate -clock*180*z  translate clock*x
    texture { MyTexture }
}

plane

    y, -1
    texture { MyTexture }
}

Sound about right anyone? Well, even close then?

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