This is for those of you who just got a loop pedal and want to get started.
The tab is basically just a loop i made the other day.
as i was making it, 
i realized that this would be great to use for a demo.

The most important thing to keep in mind while buiding a loop is...
making sure you are playing in time.
I like to play my first layer a couple times before i record it.
This gives me time to get into the groove.

When building a loop,
I feel it's important to have an idea of "instrumentation."
what i mean by that is: 
"is there a guitar part, bass line, drum beat and/or melody?"

also ask yourself:
"what kind of sound am i going for?"
"what order will certian parts be entering?"
"How long will each part last for before adding another layer?"

This is the layout for this example:

Layer 1 (Guitar Part) 4x
Layer 2 (Bass Line) 2x
Layer 3 (Drum Beat) 2x
Layer 4 (Melody) 4x
Solo
Layer 4 (Melody) 4x
Fade Out

TEMPO =  The Quater Note is about 140bpm 

Layer 1 (Guitar Part)

G||————7———————7———|————7———————7———|————10——————10——|————10——————10——||
D|o8—————8—8———————|8—————8—8———————|8—————8—8———————|8—————8—8———————o|
A|o————————————————|————————————————|————————————————|————————————————o|
E||————————————————|————————————————|————————————————|————————————————||
  |1 + 2 + 3 + 4 + |1 + 2 + 3 + 4 + |1 + 2 + 3 + 4 + |1 + 2 + 3 + 4 + |

What is written above (including the repeat) is how much that is recorded.
However, i like to play it one time through (without repeat) before recording it.
This allows me to establish time. 
after recording it i let it play one time through (without repeat).
This will give you a nice even 4 times through, making it feel complete.
It also gives you a pocket of time to prepare for the next layer.

Layer 2 (Bass Line)

G|————————————————|————————————————|————————————————|————————————————|
D|————————————————|————————————————|————————————————|————————————————|
A|————————————————|————————————————|————————————————|————————————————|
E|6———————————————|————————————////|13——————————————|———————————————h|
 |1 + 2 + 3 + 4 + |1 + 2 + 3 + 4 + |1 + 2 + 3 + 4 + |1 + 2 + 3 + 4 + |

G|————————————————|————————————————|————————————————|————————————————|
D|————————————————|————————————————|————————————————|————————————————|
A|————————————————|————————————————|————————————————|————————————————|
E|15——————————————|————————————————|11——————————————|————————————————|
 |1 + 2 + 3 + 4 + |1 + 2 + 3 + 4 + |1 + 2 + 3 + 4 + |1 + 2 + 3 + 4 + |

(If this seems a little stale to you, add some fills.)

Layer 3 (Drum Beat)

G|————x———————x———|————x————————x——|————x———————x———|————x————————x——|
D|————x———————x———|————x————————x——|————x———————x———|————x————————x——|
A|————————————————|————————————————|————————————————|————————————————|
E|x—x———x—x———————|——x———x—x———————|x—x———x—x———————|——x———x—x———————|
 |1 + 2 + 3 + 4 + |1 + 2 + 3 + 4 + |1 + 2 + 3 + 4 + |1 + 2 + 3 + 4 + |

G|————x———————x———|————x————————x——|————x———————x———|————x————————x——|
D|————x———————x———|————x————————x——|————x———————x———|————x————————x——|
A|————————————————|————————————————|————————————————|————————————————|
E|x—x———x—x———————|——x———x—x———————|x—x———x—x———————|——x———x—x———————|
 |1 + 2 + 3 + 4 + |1 + 2 + 3 + 4 + |1 + 2 + 3 + 4 + |1 + 2 + 3 + 4 + |

The "x" represents a dead note.

The "x" on the E string acts as the "Bass Drum."
I like to play the E string hit with my thumb,
This gives it a warmer sound.
However, Sometimes i like to use my pointer and middle Finger.

The "x" on the D and G strings act as the "Snare Drum."
I Use both strings to make it more present in the loop.
I've noticed that it's not as effective if i only use one string.

(Feel free to experiment with different drum patterns) 

Layer 4 (Melody — Don't Loop)

G||1719————————————|————————————————|————————————————|————14——15——17——|
D|o—/——————————————|————————————————|————————————————|——15——15——15——15|
A|o————————————————|————————————————|————————————————|————————————————|
E||————————————————|————————————————|————————————————|————————————————|
  |1 + 2 + 3 + 4 + |1 + 2 + 3 + 4 + |1 + 2 + 3 + 4 + |1 + 2 + 3 + 4 + |

G|1210————————————|————————————————|————————————————|————14——15——17——||
D|—/——————————————|————————————————|————————————————|——15——15——15——15o|
A|————————————————|————————————————|————————————————|————————————————o|
E|————————————————|————————————————|————————————————|————————————————||
 |1 + 2 + 3 + 4 + |1 + 2 + 3 + 4 + |1 + 2 + 3 + 4 + |1 + 2 + 3 + 4 + |

Solo:

This song is in Bb Major.
Here's Bb Major in 2 Octaves:

 |Bb  C   D   Eb  F   G   A   Bb  C   D   Eb  F   G   A   Bb  |
G|————————————————————————————————————————————————12——14——15——|
D|————————————————————————————————10——12——13——15——————————————|
A|————————————————8———10——12——13——————————————————————————————|
E|6———8———10——11——————————————————————————————————————————————|

Any of These notes (Bb,C,D,Eb,F,G,A) will work.
*Keep in mind these notes exist in other places on the neck*

If you're curious as to how to get more chromatic with your ideas,
here's a scale that i like to use.
I don't know the name for it, but i really like how it sounds.

 |Bb  C   C#  D   F   F#  G   Bb
G|————————————————————————————15——|
D|————————————————15——16——17——————|
A|13——15——16——17——————————————————|
E|————————————————————————————————|

You Can think of this scale as a G Blues Scale, With an F#.
You Can also think of it as Bb major pentatonic with a b3/#2 and b6/#5.

Another trick is to take the melody, and alter it.
Here's an example:
 
G|1719——1719——————|14——15——1719————|1719——1719——————|14——15——1719————|
D|—/—————/——————15|——15——15—/——————|—/—————/——————15|——15——15——————15|
A|————————————————|————————————————|————————————————|————————————————|
E|————————————————|————————————————|————————————————|————————————————|
 |1 + 2 + 3 + 4 + |1 + 2 + 3 + 4 + |1 + 2 + 3 + 4 + |1 + 2 + 3 + 4 + |

G|14——15——17——14——|15——17——14——15——|17——14——15——14——|1719————————————|
D|——15——15——15——15|——15——15——15——15|——15——15——15——15|—/——————————————|
A|————————————————|————————————————|————————————————|————————————————|
E|————————————————|————————————————|————————————————|————————————————|
 |1 + 2 + 3 + 4 + |1 + 2 + 3 + 4 + |1 + 2 + 3 + 4 + |1 + 2 + 3 + 4 + |

Notice how i'm taking the notes in the melody and then changing it rhythmically.
There's soooooo many ways to do this.

After soloing for a while, come back to the melody.
After playing the melody a couple times,
loop it and then let the loop fade out.

I know that the style of this loop is not for everybody.
It only took me a few minutes to throw this together.
The reason i like this loop is because it's simple,
it gives a sense of "instrumentation" and structure.
And It's pretty catchy.

I hope you guys got something out of this.
Looping is a big part of my playing and i really like seeing other bassists do it.
even if you're not going to make solo bass loops with your pedal,
it's a great way to practice songs you're working on.
It's also great for arranging/composing songs you'll use for bands you're in.

Please give me constrictive criticism.

—Connor Larkin