Proper technique needed to nest a setWatch() within a separate setWatch()

Just copying the code together I'd say it should look like this:

//replace D0
const CS_PIN = D0;
const CLK_PIN = D0;
const MOSI_PIN = D0;
var isActive = false;
var d=1;
var toPrint = "Got: ";

//CS_PIN
setWatch(function() {
  isActive = true;
  d=1; //cleanup at start
},CS_PIN,{edge:"rising", repeat: true});

setWatch(function() {
  isActive = false;
  console.log(toPrint);
  toPrint = "Got: ";
  if (d!==1) {
    console.log("Bit error");
  }
},CS_PIN,{edge:"falling", repeat: true});

//CLK_PIN
setWatch(function(e) {
  if (isActive) {
    d=(d<<1)|e.data;
    if (d>255) {
      toPrint = toPrint + (d&255);
      d=1; //cleanup after 8 bits
    }
  }
},CLK_PIN,{edge:"rising", data:MOSI_PIN, repeat: true});