import arcpy
n = arcpy.GetParameterAsText(3)
origfc = arcpy.GetParameterAsText(4)
fc = r"C:\temp\test.gdb\testFC" + n
if arcpy.Exists(fc):
    arcpy.Delete_management(fc)
arcpy.Copy_management(origfc,fc)
arcpy.DeleteFeatures_management(origfc)
fc2 = r"C:\temp\test.gdb\testFCcopy" + (n-1)

n > 0
While True:
        if arcpy.Exists(fc2):
            arcpy.Delete_management(fc2)
        arcpy.Copy_management(fc,fc2)
        with arcpy.da.UpdateCursor(fc2, ["SHAPE@XY"]) as cursor:
            for row in cursor:
                           cursor.updateRow([[row[0][0] + (arcpy.GetParameterAsText(0) or 0),
                                              row[0][1] + (arcpy.GetParameterAsText(1) or 0)]])
        n = n - 1
        fc = fc2
        fc2 = r"C:\temp\test.gdb\testFCcopy" + (n-1)