riff1(opening ,fast)
|-----------------------------------------------------------------------|
|-----------------------------------------------------------------------|
|-----------------------------------------------------------------------|
|-0---0---0---0---------------------------------------------------------|
|-7---8---7---8---7-------0---------------------------------------------|
|-----------------8-------8---------------------------------------------|
riff2
|---------------------------------------------------------------------|
|---------------------------------------------------------------------|
|---------------------------------------------------------------------|
|-5-7-------7-----5-7-------2-------6---------------------------------|
|---0-------8-------0-------3-------7---------------------------------|
|---------------------------------------------------------------------|
riff3(fast)
|---------------------------------------------------------------------|
|---------------------------------------------------------------------|
|---------------------------------------------------------------------|
|-7-------7-10-9-7-7-------2-------6----------------------------------|
|-0-------8--8-8-8-0-------3-------7----------------------------------|
|---------------------------------------------------------------------|
it all goes like this(i'm not sure about that):
riff1
riff2
riff3
riff1
riff2
riff3

END