Restroke excercise2 (can be done on all 6 strings)

Ex: 6 

    i   m    i   m
|---0---0----0---0---|
|--------------------|
|--------------------|
|--------------------|
|--------------------|
|--------------------|

  i m i m i m i m i m  i m i m i m i m i m  
|-0-0-1-1-2-2-3-3-4-4|-4-4-3-3-2-2-1-1-0-0|
|--------------------|--------------------|
|--------------------|--------------------|
|--------------------|--------------------|
|--------------------|--------------------|
|--------------------|--------------------|


Ex: 7

    m   i    m   i 
|---0---0----0---0---|
|--------------------|
|--------------------|
|--------------------|
|--------------------|
|--------------------|

  m i m i m i m i m i  m i m i m i m i m i
|-0-0-1-1-2-2-3-3-4-4|-4-4-3-3-2-2-1-1-0-0|
|--------------------|--------------------|
|--------------------|--------------------|
|--------------------|--------------------|
|--------------------|--------------------|
|--------------------|--------------------|

Ex: 8

  i  m  i    m  i  m             
|-0--0--0----0--0--0-|
|--------------------|
|--------------------|
|--------------------|
|--------------------|
|--------------------|

  i m i m i m i m i m i m i m i  m i m i m i m i m i m i m i m
|-0-0-0-1-1-1-2-2-2-3-3-3-4-4-4|-4-4-4-3-3-3-2-2-2-1-1-1-0-0-0|
|------------------------------|------------------------------|
|------------------------------|------------------------------|
|------------------------------|------------------------------|
|------------------------------|------------------------------|
|------------------------------|------------------------------|