x.rkt
#lang planet robby/pop-pl:1:1

Boolean x = false;
Boolean y = false;
Boolean z = false;
Boolean Or Unknown cats = unknown;

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prompt(red,cats,"Do you like cats?");
when (not(cats)) {
  prompt(blue,x,"Wise.");
}
when (cats) {
  prompt(blue,x,"Which part: the shedding or the aloofness?");           
}