startshape feather background { hue 28 sat .48 b -.125 } rule feather { atom {} feather { s 0.997 y -.45 r .125 b 0.0001 hue .1 alpha 0.1 } } rule feather { atom {} feather { s 0.997 y -.45 r .125 b 0.0001 hue -.1 alpha 0.1 } } rule feather { atom {} feather { s 0.997 y -.45 r .125 b -0.0001 hue -.1 alpha 0.1 } } rule feather { atom {} feather { s 0.997 y -.45 r .125 b -0.0001 hue .1 alpha 0.1 } } rule atom { proton{} } rule atom { electron {} } rule proton { SEED{} proton { y .25 r .25 s .999 b .001 alpha -0.001 } } rule proton .005 { electron{} } rule electron { SEED{} electron { y .25 r -.25 s .999 b .001 alpha -0.001 } } rule electron .005 { proton{} } rule SEED { CIRCLE { alpha -.75 h 1 sat .45 b .5 } }