Here is video of about a 4 lb bass taking a deer hair frog–
Good cheap book through Amazon tells you how to do it—
https://www.amazon.com/Flyfishing-topwater-bass-C-Thomas-ebook/dp/B01GOVYRTS/ref=sr_1_1?ie=UTF8&qid=1467225117&sr=8-1&keywords=flyfishing+and+topwater+bass