Cannot get my e paper to work

Hi guys,
I just got my e paper from http://www.smart-prototyping.com/E-ink-E-paper-new-version-display-module-3.3V-2.04-inch-177x72.html?search=e%20paper

And I've been following this great tutorial http://www.espruino.com/SSD1606

When I plug in the Pico, the blue LED on the epaper lights up, so there are connection.

Only problem is, that when I save this to the pico and also write save(); nothing happens on the display

// per default turn display off
digitalWrite(A7, LOW);

// run following code onInit
E.on('init', function() {
  // SPI configuration
  var spi = SPI1;
  spi.setup({
    mosi: B5,
    sck:  B3
  });
  // create display instance
  var display = require('SSD1606').connect({
    displayType: 'GDE021A1',
    spi        : spi,
    cs1Pin     : B6,
    dcPin      : B7,
    resetPin   : A8,
    busyPin    : A5,
    bs1Pin     : A6, // optional, but if not provided, you need to set the correct SPI mode 4-wire by yourself
    powerPin   : A7  // optional, just do not use the on() or off() function if you do not provide it
  });
  // activate the power to run the display, just a comfort function, 
  // you can control the power by yourself as well
  display.on();
  display.hwReset(function(){
    display.init(
      function(err){
        // (optional) fill the internal buffer for all pixels with color white, 
        // without this the default color will be black
        display.g.clear(0xFF);
        // not optional - rotate the display x and y coordinates 90 degrees to the right
        display.g.setRotation(1);
        // from here it shows the normal usage
        // set color black for subsequent uses
        display.g.setColor(0x00);
        // set fontsize, see Graphics and Fonts modules for further options
        display.g.setFontVector(20);
        display.g.drawString('Hello World!', 22, 22);
        // from here it shows the needed part
        // (needed) copy internal buffer to display buffer
        display.g.flip();
        // run the display update
        display.refreshScreen(function(err){
          // do whatever you like here, e.g. turn it off when the update is done
          // again just a comfort function
          display.off();
        });
      },
      // clearScreenColor is optional, but prevents e-paper ghosting
      // shadow of an image may be visible after refreshing (only) parts of the screen
      { clearScreenColor: 0x00 }
    );
  });
});

And I get this in the IDE

>save()
=undefined
Erasing Flash.....
Writing.............
Compressed 81600 bytes to 10374
Checking...
Done!

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