startshape fig3 background { b -1} rule fig3 {
fig2 { } fig2 { flip -90} fig3 { r 45 x -.75 y -2 s .9 hue 20}
} rule fig2 {
fig1 { } fig1 { flip -90} fig2 { r 20 s .9 hue 0}
} rule fig1 {
TRIANGLE { a -.55 hue 2 sat 1} fig1 { s .94 r 17 x .5 hue 0.1 b .03}
}