FDMEE-DATA MAPPING SCRIPT - Syntax

Source : Oracle Fusion GL and Target : Planning (ePBCS)

I am trying to change the sign ( to minus)  of Expense Accounts ( 4 series) from GL when they have Credit Balance

Same way, change the sign (to minus) of Income Accounts from GL( 5 and 6 series)  When they have Debit Balance

I tried this option script but not getting the desired sign change. Would appreciate if you can highlight syntax error or the logic formation...Just in case this is not the right way for achieving change sign, then please share such workaround(s)

Please have look at the details as given below . If not sufficient to form an opinion , please let me know other inputs you require