I wrote yesterday about "large-to-small," one of the two ways that I classify my styles of fine-line piecing. Now here's the opposite, in which you assemble lots of small pieces of fabric and sew them together, row by row, until you end up with a large expanse. It's a much more flexible approach than large-to-small, because it's so simple to undo and restitch a two-inch seam if you want to move a bit to or from somewhere else.
Here are some examples of what the workshop participants came up with. Already they were developing different approaches to working with their colors:
grouping of colors: dark at the bottom
grouping of colors: dark in the center
grouping of colors: a column of purple
adding more lines for greater density at a focal area
using striped fabric for the skinny lines (some strips cut with the stripes, some cut across)