2wap site page scrolling method

I need to know How you scoll page while reading content of the page Suppose/imagine you are not touching phone merely waving hand or making gesture in front of front camera of the phone Your finger position Up then down or long up to slow down , ..............? Your answer may contain combination of direction of your fingers/hand right ,left ,up ,down , long up , long down , long right , long left Best description will get 1000 pulses

I place 4 of my fingers behind the smart Phone the i use my both thumbs to type messages and i use my index finger to scroll down while the rest of my fingers rests behind the phone!

I am try via front camera gesture scrolling , problem if we shake mobile then mobile start scrolling up or down , right /left OK for fun I am include combination of up then finger down fast sense up scrolling , same for down that solve unwanted up / down