Hi All - I seem to be doing something wrong?!

I am following along with the examples in the Bryan WC Chung book - 'Multimedia Programming with Pure Data' & I think I have all parameters right?

But, as you can see from the attached vid, things aren't going as expected. It started off O.K. when completed - green wire sphere calmly looping round on the x axis, smaller pink sphere rotating round green sphere - but quickly got the jitters!

Can anyone see any obvious mistakes please?

Many thanks.

Anomaly.mp4

try to place your 2 spheres in 2 differents [gemhead],
or use [separator. In your example you apply 2 differents rotations (one after the other) to 1 gemhead, so the 'glitch' effect

@rep - Hi. Thanks for the reply but I'm just replicating Bryan WC Chung's patch on page 76 of his Guide.. Will give it a try later though. Many thanks.!