[NTG-context] how to apply gradient color to a piece of text?

[seyal.zavira@gmail.com]

hi all,

when i look at luametafun manual there are some intresting examples that can apply gradient colors to metapost paths.
how i can apply this cool feature to a piece of text?

i tried the code below but it does not produce any result.

\definecolor[Gleft] [h=9f9393]
\definecolor[Gright] [h=ff1aa4]
\startMPpage
picture Mytext;
Mytext := btex hello etex;

draw lmt_shade [
picture="Mytext",
direction = "right",
domain= { 0, 2 },
colors= { "headerGleft", "headerGright" },
] ;
\stopMPpage
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