// https://frinklang.org
s = readLines["file:scarfquine1.frink"]
g = new graphics;  g.font["Monospaced", 1]
g.antialiasedText[false]
for n = 0 to length[s]-1
   g.text[s@n, (n div 10) * 40,
      1.22 (n mod 10), "left", "center"]
f =  new image[g, 1200, 100];
f.makeMono[]; f.show[]
f.write["scarfquine1.tif"]
[w, h] = f.getSize[]
n = 0
for x = w - 1 to 0 step -1
   for y = 0 to h - 1
   {
      n = n * 2
      [r,g,b] = f.getPixel[x,y]
      if r < 1/2
         n = n + 1
   }
// https://knityak.com
n = n * h
println["n = $n"]
println["Graph the points:"]
println["   0 <= x < $w,"]
println["   n <= y < n + $h,"]
println[" where"]
println[" 1/2 > floor(mod(floor(y / $h)*"]
println["    2^(-$h * floor(x) -   "]
println["       mod(floor(y), $h)),2))"]

// Reproduce the scarf just from n
gr = new graphics
for x = 0 to w - 1
   for y = n to n + h - 1
      if ((y div h) * 2 ^ (-h x -
          (y mod h))) mod 2 >= 1/2
         gr.fillRectCenter[x, -(y - n), 1, 1]
gr.show[]