Creating an Audit Trigger

Hi, I have a table called payments Which has an LocationID , MensualAmount and Numbre of payments

I want to make a trigger that when someone changes anything in any of these columns , it will write the date it was changed, the old value the new value and which LocationID was changed in an Audit table

Im trying to use a For Update trigger , but im lost 

can anyone point me on the right track ?