[How do I make the pencil tool automatically vary around the same base colour?]

6 hours ago, welshblue said:

 

I might have got the wrong end of the stick with the question, but I would have thought Gradient and then possibly  Jumble  if randomness isn't an issue.

Make your image bigger than you want, then resize it so the squares aren't so obvious

 

 

 

Thanks, this is exactly what I wanted, jumbling the colours!

[How do I make the paintbrush tool do only solid pixels instead of the weird outline thing?]

@AndrewDavid Thanks so much, solved my problem!

[How do I make the pencil tool automatically vary around the same base colour?]

Instead of the paintbrush tool doing just the same colour that I have set, is there a way to make it constantly change colour (around the same base colour) 

 

Instead of this with the pencil tool:

 

I want it to do this:

 

 

Also, even if it can't do that, does anyone know the name of this function?

 

 

[How do I make the paintbrush tool do only solid pixels instead of the weird outline thing?]

I want the brush to solid pixels and no different shades outlines.

 

I want it like this:

 

 

 

And not like this

 

 

I'm working on a low res image so thats why but anyway to stop it and keep it all the same colour?