Write small code in Google scripts

I use the below code in VBA in excel but i want the same function to be written in google scripts which i want to use in google sheets. Code as below : Private Sub Worksheet_Change(ByVal Target As Range) Dim temp As Range, max As Range, min As Range Set temp = Range("A2") Set max = Range("B2") Set min = Range("C2") If Not Intersect(temp, Target) Is Nothing Then max = [login to view URL](Target, max) min = [login to view URL](Target, min) End If End Sub Value of A2 keeps changing with time,therefore, What this code does is It records the Highest and Lowest Value from cell A2 to B2 and C2 respectively.