startshape fig4 background { b -1}
rule fig4 {
fig3 { r -45 x -1.3} fig3 { r +45 x +1.3 flip +90} fig3 { r 180 y -.5 x +1.5} fig3 { r 180 y -.5 x -1.5 flip +90}
}
rule fig3 {
fig2 { } fig3 { s .9 hue 14 y 1 r 45}
}
rule fig2 {
fig1 { } fig2 { s .9 r 30 x .25 hue 4.5}
}
rule fig1 {
SQUARE { sat .8 b 0 hue 6} fig1 { s .9 b .05 r 45 x .5}
}