The first 8 measures will play twice. Make sure in your charts to always pair an open repeat bar line with a closing one.
You can also add a text indication like 3x4x...Nx in the last measure of the repeated section and it will be repeated N times.
In conjunction with repeat bar lines, 1st, 2nd and 3rd endings are also recognized.
You can also use the standard Single and Double bar repeats: