Its no too difficult to do with parctice, just build up slowly trying to keep a nice even tempo. If you want to see some insane guitar work, check these out https://www.youtube.com/watch?v=AbndgwfG22k https://www.youtube.com/watch?v=Ddn4MGaS3N4 https://www.youtube.com/watch?v=b1GZC0GQKOA&feature=user https://www.youtube.com/watch?v=JsD6uEZsIsU https://www.youtube.com/watch?v=yh_24DXNy8E Also look out for any other of Justin Kings stuff.