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 3x, 4x...Nx in the last measure of the repeated section and it will be repeated N times. Do this using the Text editor keyboard for iOS and Android, (Mac version text editor)
In conjunction with repeat bar lines, 1st, 2nd and 3rd endings are also recognized.