How to create Triggers to add the change events into Audit Log tables

Suppose we have 50 tables in a database and we want to capture all the changes (Previous value and new value of columns) across the columns of each table. An audit table will be there, which will have below columns:

ID, Server_Name, User_Name, Date_Time, Table_Name, Column_Name, Old_Value, New_Value

There will be one audit table which will capture the changes of all the tables from that database. I believe we can create triggers for each of the table of that database. But please let me know how all the data will be added into one audit table. If you can provide me with a working example that will be very helpful.

Thanks and regards, Partha