You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: GB_giveMeSomeLights.m
    path of file: ./repos/GIBBON/studies/2021_Nataliya_Perevoshchikova_wrist_project/functions
    
    the code of the file until where you have to start completion: function [] = GB_giveMeSomeLights(thanks,parentName)
% Bardiya Akhbari
% This is an add-on for plotboneVRML function

if thanks == 1
    if ~exist('parentName','var')

    
function [] = GB_giveMeSomeLights(thanks,parentName)
% Bardiya Akhbari
% This is an add-on for plotboneVRML function

if thanks == 1
    if ~exist('parentName','var')
        colormap(jet);
        light('Position',[150 0 0],'Style','local');
        light('Position',[0 150 0],'Style','local');
        light('Position',[0 0 150],'Style','local');
        light('Position',[200 200 100],'Style','local');
    else
        light('Position',[150 0 0],'Style','local','Parent',parentName);
        light('Position',[0 150 0],'Style','local','Parent',parentName);
        light('Position',[0 0 150],'Style','local','Parent',parentName);
        light('Position',[200 200 100],'Style','local','Parent',parentName);
    end