Constant crashing of TEMPERATURE ON A PCD8544 DISPLAY, WITH DS18B20 TEMPERATURE SENSOR

Hmm. Perhaps I am missing something .. this is my code, I changed the Temp drawstring back to 0,0 and sent the code to espruino, but the display of "Temp" is off the screen again ..

var ow = new OneWire(B13);
var g, temp;
function onInit() {
  SPI1.setup({ baud: 1000000, sck:B3, mosi:B5 });
  clearInterval();
  temp = require("DS18B20").connect(ow);
  g = require("PCD8544").connect(SPI1,B6,B7,B8, function() {
    setInterval(onTimer, 500);
  });
}
function onTimer() {
  // Get the temperature
  var t = temp.getTemp();
  // Round it to the nearest 0.1
  t = Math.round(t*10)/10;
  // Now draw!
  g.clear();
  g.setFontBitmap(); // simple 8x8 font
  g.drawString("Temp",0,0);
  g.drawLine(0,10,84,10);
  g.setFontVector(25); // large font
  g.drawString(t, 0, 15);
  g.flip(); // copy this to the screen
}
onInit();