[plt-scheme] color:text% using problem

 hi there, 
 I'm trying to use a color:text% object to get colored text, but I don't realy understand how to use it. I know how to make my lexer and the tokens I nead, but I can't understand where exactly to put them. It is probably in the parametters of the start-colorer function in color:text% but how (: 
 PLT documentation seems very insufficient and pattern missing to me.. 
 I'll be grateful if somebody can give me patterns or explanations.
 thanks in advance

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