Child script can be found in the left most icon on the line of LineTracer in the Scene Hierarchy window within V-REP
If you want to add a customization script:
-
LineTracer_custome_scratch.lua
Scratch content when associating a customization script to LineTracer robot -
LineTracer_custome.lua
(TO DO) Build starting from simple controllerBubbleRob.lua
script taken from Line following BubbleRob tutorial