lv_meter_add_scale_lines() function
Add a scale line indicator the scale. It will modify the ticks.
Arguments
obj
pointer to a meter object
scale
pointer to scale (added to `meter`)
color_start
the start color
local
tell how to map start and end color. true: the indicator's start and end_value; false: the scale's min max value
width_mod
add this the affected tick's width
Return value
the new indicator