How to Grayscale Image in Lua - Code Snippet

-- Task: Grayscale Image
-- Language: Lua

function grayscale_image() 
    -- Implementation for Grayscale Image
    local result = ...; -- Initialize variable
    -- TODO: Implement core logic here
    -- Step 1: Prepare data
    -- Step 2: Process Grayscale Image
    print("Done");
end