set_up_loan_effect

set_up_loan_effect = {
	save_temporary_scope_as = loanee
	set_variable = {
		name = loan_holder
		value = $LENDER$
	}
	set_variable = {
		name = loan_amount_owed
		value = $AMOUNT$
	}
	set_variable = {
		name = years_since_loan
		value = 0
	}
	set_variable = {
		name = original_loan_holder
		value = scope:loanee
	}
	set_variable = {
		name = original_lender
		value = $LENDER$
	}
	$LENDER$ = { #To make the loan inheritable
		add_to_variable_list = { # list so that multiple rulers can take loans simulataneously
			name = owes_me_money
			target = root
		}
		hidden_effect = {
			if = {
				limit  = { exists = scope:loanee.var:loan_amount_owed }
				pay_short_term_gold = {
					target = scope:loanee
					gold = scope:loanee.var:loan_amount_owed
				}
			}
 		}
	}
}

As written in game/common/scripted_effects/00_scripted_effects.txt.