100 setxunit
12 setborder
90 setangle_repere
-3 3 setxrange
-3 3 setyrange
/quadrillagegray 0.4 def
1 setquadrillagexstep
1 setquadrillageystep
quadrillage
1 1 settkstep
.5 .5 setsubtkstep
2 2 setmkstep
ticks
marks
traceaxes
axesarrow
2 setlinewidth
continu
bleu
/X {settvar
#rpn#   Sin(t)^3
} def
/Y {settvar
#rpn#   Cos(t)-Cos(t)^4
} def
 0 pi 2 mul  {X} {Y} Courbeparam