my code.

This is a related list program

<apex:page standardController="customer__c">
    <apex:pageBlock >
    Youre looking at some related lists for {!customer__c.Customer_name_del__c}:
    </apex:pageBlock>
<!-- <apex:relatedlist list="transaction__C" /> -->

    <apex:relatedList list="loan__c" />

 
</apex:page>