A continuum of frac-3-tiles. Each third of this one is the overall figure reduced by sqrt 3 and flipped vertically.

**(c21) **

block([plot_style:dragstyle],flap3(8,.0005))$

Each third of this one is the overall figure reduced by sqrt3 and flipped horizontally. These similarities are preserved under continuous vertical or horizontal stretching.

**(c20) **

flap3(4,.001)$