Now we just simply cut the outline with the lines already made. In illustrator we make the following: Select the first line
go to OBJECTS then PATH and DIVIDE OBJECTS BELOW (for other vectoring programs you have to checks how divide object is done i'm sure you can find tutorials for this). This is done because now we get a nicely cut bonus.
Do this with all the bonus line you made (again this is where planning you're bonuses and lines comes to light) After we do this with all the bonuses, comes the most important part.
Select them all and then offset for -0.5 pixels.
For illustrator go OBJECT then PATH and OFFSET PATH. In the offset menu type -0.5 px and hit OK.
After the work is done you get new lines that are offset for 0.5 px (obviously :)) make sure you don't deselect and hit ctrl+x to cut, delete the old lines and hit strl+f paste on spot. This is where we get nice clean separation between the bonuses without any gaps or jagged lines.
We go to the next step :)