#!/usr/local/bin/gnuplot -persist
# set terminal pngcairo  transparent enhanced font "arial,10" fontscale 1.0 size 600, 400 
# set output 'polygons.2.png'
unset border
unset key
set style line 101  linecolor rgb "forest-green"  linewidth 1.000 dashtype solid pointtype 101 pointsize default
set style line 102  linecolor rgb "goldenrod"  linewidth 1.000 dashtype solid pointtype 102 pointsize default
set object  1 polygon from 0.00000, 1.00000, 1.61803 to 1.00000, 1.61803, 0.00000 to -1.00000, 1.61803, 0.00000 to 0.00000, 1.00000, 1.61803
set object  1 depthorder clip lw 1.0  dashtype solid fc  linestyle 101 fillstyle  transparent pattern 1 border lt -1
set object  2 polygon from 0.00000, 1.00000, 1.61803 to -1.00000, 1.61803, 0.00000 to -1.61803, 0.00000, 1.00000 to 0.00000, 1.00000, 1.61803
set object  2 depthorder clip lw 1.0  dashtype solid fc  linestyle 101 fillstyle  transparent pattern 2 border lt -1
set object  3 polygon from 0.00000, 1.00000, 1.61803 to -1.61803, 0.00000, 1.00000 to 0.00000, -1.00000, 1.61803 to 0.00000, 1.00000, 1.61803
set object  3 depthorder clip lw 1.0  dashtype solid fc  linestyle 101 fillstyle  transparent pattern 3 border lt -1
set object  4 polygon from 0.00000, 1.00000, 1.61803 to 0.00000, -1.00000, 1.61803 to 1.61803, 0.00000, 1.00000 to 0.00000, 1.00000, 1.61803
set object  4 depthorder clip lw 1.0  dashtype solid fc  linestyle 101 fillstyle  transparent pattern 4 border lt -1
set object  5 polygon from 0.00000, 1.00000, 1.61803 to 1.61803, 0.00000, 1.00000 to 1.00000, 1.61803, 0.00000 to 0.00000, 1.00000, 1.61803
set object  5 depthorder clip lw 1.0  dashtype solid fc  linestyle 101 fillstyle  transparent pattern 5 border lt -1
set object  6 polygon from 0.00000, 1.00000, -1.61803 to 1.00000, 1.61803, 0.00000 to 1.61803, 0.00000, -1.00000 to 0.00000, 1.00000, -1.61803
set object  6 depthorder clip lw 1.0  dashtype solid fc  linestyle 101 fillstyle  transparent pattern 6 border lt -1
set object  7 polygon from 0.00000, 1.00000, -1.61803 to 1.61803, 0.00000, -1.00000 to 0.00000, -1.00000, -1.61803 to 0.00000, 1.00000, -1.61803
set object  7 depthorder clip lw 1.0  dashtype solid fc  linestyle 101 fillstyle  transparent pattern 7 border lt -1
set object  8 polygon from 0.00000, 1.00000, -1.61803 to 0.00000, -1.00000, -1.61803 to -1.61803, 0.00000, -1.00000 to 0.00000, 1.00000, -1.61803
set object  8 depthorder clip lw 1.0  dashtype solid fc  linestyle 101 fillstyle  transparent pattern 8 border lt -1
set object  9 polygon from 0.00000, 1.00000, -1.61803 to -1.61803, 0.00000, -1.00000 to -1.00000, 1.61803, 0.00000 to 0.00000, 1.00000, -1.61803
set object  9 depthorder clip lw 1.0  dashtype solid fc  linestyle 101 fillstyle  transparent pattern 9 border lt -1
set object 10 polygon from 0.00000, 1.00000, -1.61803 to -1.00000, 1.61803, 0.00000 to 1.00000, 1.61803, 0.00000 to 0.00000, 1.00000, -1.61803
set object 10 depthorder clip lw 1.0  dashtype solid fc  linestyle 101 fillstyle  transparent pattern 10 border lt -1
set object 11 polygon from -1.00000, -1.61803, 0.00000 to 0.00000, -1.00000, 1.61803 to -1.61803, 0.00000, 1.00000 to -1.00000, -1.61803, 0.00000
set object 11 depthorder clip lw 1.0  dashtype solid fc  linestyle 101 fillstyle  transparent pattern 11 border lt -1
set object 12 polygon from -1.00000, -1.61803, 0.00000 to -1.61803, 0.00000, 1.00000 to -1.61803, 0.00000, -1.00000 to -1.00000, -1.61803, 0.00000
set object 12 depthorder clip lw 1.0  dashtype solid fc  linestyle 101 fillstyle  transparent pattern 12 border lt -1
set object 13 polygon from -1.00000, -1.61803, 0.00000 to -1.61803, 0.00000, -1.00000 to 0.00000, -1.00000, -1.61803 to -1.00000, -1.61803, 0.00000
set object 13 depthorder clip lw 1.0  dashtype solid fc  linestyle 101 fillstyle  transparent pattern 13 border lt -1
set object 14 polygon from -1.00000, -1.61803, 0.00000 to 0.00000, -1.00000, -1.61803 to 1.00000, -1.61803, 0.00000 to -1.00000, -1.61803, 0.00000
set object 14 depthorder clip lw 1.0  dashtype solid fc  linestyle 101 fillstyle  transparent pattern 14 border lt -1
set object 15 polygon from -1.00000, -1.61803, 0.00000 to 1.00000, -1.61803, 0.00000 to 0.00000, -1.00000, 1.61803 to -1.00000, -1.61803, 0.00000
set object 15 depthorder clip lw 1.0  dashtype solid fc  linestyle 101 fillstyle  transparent pattern 15 border lt -1
set object 16 polygon from -1.00000, 1.61803, 0.00000 to -1.61803, 0.00000, -1.00000 to -1.61803, 0.00000, 1.00000 to -1.00000, 1.61803, 0.00000
set object 16 depthorder clip lw 1.0  dashtype solid fc  linestyle 101 fillstyle  transparent pattern 16 border lt -1
set object 17 polygon from 1.00000, -1.61803, 0.00000 to 0.00000, -1.00000, -1.61803 to 1.61803, 0.00000, -1.00000 to 1.00000, -1.61803, 0.00000
set object 17 depthorder clip lw 1.0  dashtype solid fc  linestyle 101 fillstyle  transparent pattern 17 border lt -1
set object 18 polygon from 1.00000, 1.61803, 0.00000 to 1.61803, 0.00000, 1.00000 to 1.61803, 0.00000, -1.00000 to 1.00000, 1.61803, 0.00000
set object 18 depthorder clip lw 1.0  dashtype solid fc  linestyle 101 fillstyle  transparent pattern 18 border lt -1
set object 19 polygon from 1.61803, 0.00000, 1.00000 to 1.00000, -1.61803, 0.00000 to 1.61803, 0.00000, -1.00000 to 1.61803, 0.00000, 1.00000
set object 19 depthorder clip lw 1.0  dashtype solid fc  linestyle 101 fillstyle  transparent pattern 19 border lt -1
set object 20 polygon from 1.61803, 0.00000, 1.00000 to 0.00000, -1.00000, 1.61803 to 1.00000, -1.61803, 0.00000 to 1.61803, 0.00000, 1.00000
set object 20 depthorder clip lw 1.0  dashtype solid fc  linestyle 101 fillstyle  transparent pattern 20 border lt -1
set object 21 polygon 
set object 21 depthorder clip lw 1.0  dashtype solid fc  linestyle 101 fillstyle  transparent pattern 21 border
unset parametric
set view 30, 30, 1.5, 1
set view  equal xyz
set style data lines
unset xtics
unset ytics
unset ztics
unset cbtics
unset rtics
set title "2-sided coloring\ngreen outside, yellow inside" 
set xrange [ -2.00000 : 2.00000 ] noreverse nowriteback
set x2range [ * : * ] noreverse writeback
set yrange [ -2.00000 : 2.00000 ] noreverse nowriteback
set y2range [ * : * ] noreverse writeback
set zrange [ -2.00000 : 2.00000 ] noreverse nowriteback
set cbrange [ * : * ] noreverse writeback
set rrange [ * : * ] noreverse writeback
set pm3d depthorder 
set pm3d interpolate 1,1 flush begin noftriangles border linecolor rgb "black"  linewidth 2.000 dashtype solid corners2color mean
set colorbox vertical origin screen 0.9, 0.2 size screen 0.05, 0.6 front  noinvert bdefault
NO_ANIMATION = 1
phi = 1.61803398874989
n = 21
splot -10