startshape main45 background {hue 0 sat 1 b -0.3} path mezza { MOVETO {x -0.5 y 0} ARCTO { x 0 y 0.5 rx 0.5 ry 0.5 } STROKE {hue 55 sat 1 b 1 width 0.39 } } rule piastrella 5 { mezza {} mezza {flip 45} } rule piastrella 1{ mezza {flip 90} mezza {flip 180} } rule elem_bordo { mezza {f 90} mezza {x 0.99} } rule bordo { 10* {x 1.98} elem_bordo{y -1} } rule main { 20 * {y 0.99} {20* {x 0.99 } piastrella {}} bordo{y 0.01} bordo{r 90 x 18.8} bordo{f 0 y 18.8} bordo{r -90 y 18.81 x 0.02} } rule main45{ main{r 45} }