startshape four rule four { flower{hue 50 sat 1} flower{r 180 hue 50 sat 1} flower{r 90 hue 0 sat 1} flower{r -90 hue 0 sat 1} } rule flower { trianglerose{} trianglerose{x 1 y 1 r 180} } rule trianglerose { TRIANGLE{b 0} TRIANGLE{size .99 b 1} trianglerose{size .98 r 3} }