I have been fiddeling with some lua scripts trying to understand. Found the following for movement of a object:

I have used the light position for an example of a dildo moving like this (move forward 0.03 from 0 and move - 0.03 passed 0 to the back.

so move + 0.03 from 0 and move -0.03 back from 0 as a callback. 0.03 is the value used to make the movement. 0.05 will give a longer movement.

local script = {}
--SCRIPT BODY - any functions and calculations
--====================================================================================================
--main function that will be used as frame update callback
--id         - object id allow access to object storage
--delta     - time passed from last frame, i.e frame time
local function update( id, delta ) 

    --here the main script things logic, calculations and so on
    local st = db.storage[id]
    if st then
        
        st.object.position = st.object.position + Vector3( 0, 0, 1) * st.move_speed * delta Vector3 is the same as (x,y,z) the possition where you set your 1 will be the axis used in the code, this one is Z for backward and forward, Y up and down, x left and right)
        if st.object.position.z > (st.base_pos.z + 0.03) or st.object.position.z < (st.base_pos.z - 0.03) then if st.objects.position.z is bigger than st.base_pos.z [so thats 0] or st.object.position.z is smaller than 0
            st.move_speed = st.move_speed * -1  This will give the movement
        end
        
    end
    
end
--================================================================================================
--BIND - this function called when object binded with script and allow register all desired callbacks
--================================================================================================
function script:bind_to_object( st, binder )--object storage and callback binder
    
    --declare per object variables
    st.base_pos = st.object.position this sets the =0.03 and -0.03
    st.move_speed = 0.8 set the speed of the toy here where 1 is max
    
    
    --register callback in array of active callbacks this will make it repeat
    binder:add_callback( CALLBACK_GLOBAL, "on_frame_update", st.object.id, update )
    --callback class
    --callback type
    --object id
    --function that will be used as callback
end
--====================================================================================================
--script registration
db.script_list["sc_simple_light_position_move"] = script  this is where you name the script. needs to be the same as script name

i have called it simple_move_position.script

1. so set your axis here by placing the 1 to vector3 st.object.position = st.object.position + Vector3( 0, 0, 1) read as (x,y,z) or (left\right, up\down, forward\backward)

2. set your movement coordinates here         if st.object.position.z > (st.base_pos.z + 0.03) or st.object.position.z < (st.base_pos.z - 0.03) then 

3. set your speed here      st.move_speed = 0.8 where 1 is max 

set the object in your leveldef like this:

[Dildo script]
enable = true
type = static
style = object
file = ![obj] h5 sexvision obj pack\cockpack\youthcockpack1\youthcockalienengineer\meshes0.h5m
position = 0.850370, 1.677861, -0.644488
rotation = 0.000000, 0.000000, 0.000000
scale = 1.000000, 1.000000, 1.000000
color_multiplier = 255, 255, 255, 255
metallness_multiplier = 1.000000
glosiness_multiplier = 1.000000
glow_intensity = 0.000000
cast_shadow = true
alpha_mask = true
alpha_blend = true
cull_mode = 4
rendering_source = 
rendering_source_uvoffset = 0.000000, 0.000000
rendering_source_uvscale = 1.000000, 1.000000
script_name = sc_simple_position_move
parent_name = 
 

you can parent a light to the object that used the script to make the light move

add to

[Light}

parent_name = Dildo script

Simple move script.rar