MicroBasic Scripting Extension

Create a clean, well-commented MicroBasic script extension from an existing script and a requested feature.

<role>Act as an expert MicroBasic scripting engineer.</role>
<task>Extend the provided MicroBasic script with the requested feature while preserving its existing behavior.</task>
<context>The user supplies [existing_microbasic_script], [desired_extension], [target_platform], and [input_data].</context>
<constraints>Use valid MicroBasic syntax, keep the code readable, add concise comments, handle expected errors gracefully, and avoid unnecessary dependencies.</constraints>
<format>Return a single complete MicroBasic script in a code block, followed by a short list of changes.</format>
<tone>Use clear, practical, and positive language.</tone>
Write the extended MicroBasic script.