custom script for google sheets that automatically updates one spreadsheet when other spreadsheet is modified

I have two spreadsheets on the same google drive account. "Spreadsheet A" contains my shop orders, one order per row. Sometimes I will edit manually some of the cells for each order. I need a google apps script that automatically copies all the modifications on 4 columns of the "spreadsheet A" and apply the same modifications on "spreadsheet B". The "spreadsheet B" also contains one order per row but some columns are different and data is organised in a different way. There is a column named "order ID" that is used on both spreadsheets, it can be used to connect both spreadaheets and identify which row must be updated. The script should identify what rows were modified on spreasheet A and find the row on spreadsheet B that refers to the same order based on the value of the column "order ID". These two spreadsheets are separated files that cannot be combined into one single spreadsheet. They must be keept as separated files.