Hello,
after one year I finally consider my mouse jiggle configuration stable and useful 
Here is my approach:
$onInit:
setLedTxt 500 "INI"
// Init global variables used by other scripts
setVar jigActive 0
setVar powerClickActive 0
Mouse Jiggle:
// Toggle jiggle state
setVar jigActive !$jigActive
if ($jigActive == 0) break
// Enable Backlight
set backlight.keyRgb.base.80 255 255 0
// Show start sequence
setLedTxt 500 "JIG"
setLedTxt 500 "ON!"
loop:
<UI: Move pointer by 10px rightward>
if ($jigActive == 0) goTo exit
delayUntil 250
<UI: Move pointer by 10px leftward>
if ($jigActive == 0) goTo exit
delayUntil 250
if ($jigActive == 1) goTo loop
exit:
// Disable Backlight
set backlight.keyRgb.base.80 255 255 255
// Show end sequence
setLedTxt 500 "JIG"
setLedTxt 500 "OFF"