here is the easy but cool 911 from wyclef

|-----/7-5-----------------|---/7-5-------------------------------|
|----------8-7-8-7-------3-|--------8-7-8-7------------------3----|
|----------------------4---|-----------------------4-------4------| repeat
|--------------------4-----|---------------------5-------4--------|
|------------------2-------|-0-----------------5-------2----------|
|--0-----------------------|-----------------3--------------------|