Bangle2 need help with barometer app

Right, well I get the dial but no hand and no value, here's my code below;

var center = {
  x: g.getWidth()/2,
  y: g.getHeight()/2,
};

var MIN = 0;
var MAX = 12;
var NUMBER_OF_VALUES = MAX - MIN;
var SCALE_TICK_STEP = 4;
var SCALE_VALUES_STEP = 2;
var NUMBER_OF_LABELS = NUMBER_OF_VALUES / SCALE_VALUES_STEP;
var NUMBER_OF_TICKS = NUMBER_OF_VALUES / SCALE_TICK_STEP;
var ZERO_OFFSET = (Math.PI / 4) * 3;
var SCALE_SPAN = (Math.PI / 2) * 3;
var TICK_LENGTH = 10;
var HAND_LENGTH = 45;
var HAND_WIDTH = 5;
var maxZ = 0;

function generatePoly(radius, width, angle){
  var x = center.x + Math.cos(angle) * radius;
  var y = center.y + Math.sin(angle) * radius;
  var d = {
    x: width/2 * Math.cos(angle + Math.PI/2),
    y: width/2 * Math.sin(angle + Math.PI/2),
  };
  
  var poly = [center.x - d.x, center.y - d.y, center.x + d.x, center.y + d.y, x + d.x, y + d.y, x - d.x, y - d.y];
  
  return poly;
}

function drawHand(value){
  g.setColor(g.theme.fg2);
  
  g.setFontAlign(0,0);
  g.setFont("Vector",24);
  g.drawString(value, center.x, center.y * 2 - 65, true);

  var angle = SCALE_SPAN / NUMBER_OF_VALUES * (value - MIN) + ZERO_OFFSET;
  g.fillPoly(generatePoly(HAND_LENGTH, HAND_WIDTH, angle), true);
  g.fillCircle(center.x ,center.y, 4);
}


function drawTicks(){
  g.setColor(g.theme.fg);
  for(let i= 0; i <= NUMBER_OF_TICKS; i++){
    var angle = (i * (SCALE_SPAN/NUMBER_OF_TICKS)) + ZERO_OFFSET;

    var tickWidth = i%5==0 ? 5 : 2;
    g.fillPoly(generatePoly(center.x, tickWidth, angle), true);
  }
  
  g.setColor(g.theme.bg);
  g.fillCircle(center.x,center.y,center.x - TICK_LENGTH);
}


function drawScaleLabels(){
  g.setColor(g.theme.fg);
  g.setFont("Vector",17);

  let label = MIN;
  for (let i=0;i <= NUMBER_OF_LABELS; i++){
    var angle = (i * (SCALE_SPAN/NUMBER_OF_LABELS)) + ZERO_OFFSET;
    var labelDimensions = g.stringMetrics(label);

    var LABEL_PADDING = 5;
    var radius = center.x - TICK_LENGTH - LABEL_PADDING;
    var x = center.x + Math.cos(angle) * radius;
    var y = center.y + Math.sin(angle) * radius;

    var visualX = x > center.x ? x - labelDimensions.width : x + labelDimensions.width > center.x ? x - (labelDimensions.width / 2) : x;
    var visualY = y >= center.y - labelDimensions.height / 2 ? y - labelDimensions.height / 2 : y;

    g.drawString(label, visualX, visualY);

    label += SCALE_VALUES_STEP;
  }
}

g.setBgColor(g.theme.bg);
g.clear();

drawTicks();
drawScaleLabels();
drawIcons();


try {
 function accelHandler() {
  if (accel.z > maxZ) {
      maxZ = accel.z;
    }
    
    drawHand(Math.round(maxZ));
    layout.maxZ.label = maxZ;
   
  // layout.render();
  }
   Bangle.setPollInterval(80);
  Bangle.on('accel', accelHandler);


} catch(e) {
  print(e.message);
   print("value exceeds limits");
  drawHand(MIN);
}