Complex sentence: Other color patterns exist: the Orange and Black pattern was run by Outpost flags at the time of Harley Davidson's 100th anniversary, so that the bikers would help keep the issue alive and in the forefront of American politics.
Split into simpler sentences: Other color patterns exist the, The Orange and Black pattern was run by Outpost flags At the time Of Harley Davidson's 100th anniversary. So that the Bikers would help Keep the issue alive and in the forefront of American politics.