function main(workbook: ExcelScript.Workbook) {
    // Specify the sheet names
    let mainSheetName = "System Items";
    let lookupSheetName = "Foglio1";

    // Get the sheets
    let mainSheet = workbook.getWorksheet(mainSheetName);
    let lookupSheet = workbook.getWorksheet(lookupSheetName);

    // Get used ranges (assuming data starts from row 1)
    let mainRange = mainSheet.getUsedRange();
    let lookupRange = lookupSheet.getUsedRange();

    // Sync to populate the values
        let mainValues = mainRange.getValues();
        let lookupValues = lookupRange.getValues();

        // Map to hold value-color pairs from the lookup sheet
        let colorMap : Map<String,String> = new Map();

        // Populate the map with lookup values and colors
        for (let i = 0; i < lookupValues.length; i++) {
            colorMap.set(lookupValues[i][0], lookupSheet.getRange(`A${i + 1}`).getFormat().getFill().getColor());
        }

        // Loop through the main sheet's rows
        for (let row = 0; row < mainValues.length; row++) {
            let cellValue = mainValues[row][0]; // Column A value
            let color = "#FFFFFF";
            // Check if the value is in the map
            if (colorMap.has(cellValue)) {
                // Get the corresponding color
                    color = colorMap.get(cellValue);
            }

            // Apply the color to the entire row
            mainSheet.getRange(`A${row + 1}:Z${row + 1}`).getFormat().getFill().setColor(color);
        }
}