Need a model play random animations at a fixed interval when you sit on a pose stand? Just drop this script in an invisible prim, together with a few animations.
This script comes in 3 versions. One with manual vertical adjustment of sitting avatar position, version 3 with configurable vertical adjustment of this same value, and version 4 with configurable adjustment for all axis x, y and z, just by writing values in the chair or prim description.
Also available a variant that plays random animations at a random time interval between a minimum and maximum in seconds you set in a configuration note. See related items below.
Also available a variant that works the same when you attach/wear an object instead of sitting on an object. See related items below.