How to Async Grayscale Image in Nim - Code Snippet

# Task: Async Grayscale Image
# Language: Nim

proc async_grayscale_image() =
    # Implementation for Async Grayscale Image
    var result = ...; # Initialize variable
    # TODO: Implement core logic here
    # Step 1: Prepare data
    # Step 2: Process Async Grayscale Image
    echo("Done");