applications.collages.collageAlgebra:
{
  tip = const(5 * sqrt(3)),

  S = { "?" [ "Serif" ] size 24 at (0,0) },
  
  f1 = scale(.5) . translate(-5,-#tip / 2),
  f2 = scale(.5) . translate(0, #tip / 2),
  f3 = scale(.5) . translate(5,-#tip / 2),
  F = < f1, f2, f3 >
  
}
