Contour lines are not drawn as I want

Here is my codes ( important!! : z,x,y values ​​will not change) :



var data = [{
  z: [[null,null,null,null,null,null,96.2,null,null,null,null,null,null,null,null,null,null],
       [null,null,null,null,null,null,null,null,null,null,null,null,null,96.9,null,null,null],
   [null,null,null,null,null,null,null,null,null,null,93.5,null,null,,null,null,null,null],
      [null,null,null,null,null,null,92.1,null,null,null,null,null,null,null,null,null,null],
     
      [null,null,null,null,91.2,null,null,null,null,null,null,null,null,null,null,null,null],
     
     [null,null,null,null,null,null,null,null,null,null,null,null,92.6,null,null,null,null],
     [null,null,null,null,null,null,null,87.1,null,null,null,null,null,null,null,null,98.5],
     [null,null,null,89.3,null,null,null,null,null,87.6,null,null,null,null,null,null,null],
     [null,null,null,null,null,null,null,null,null,null,null,88.6,null,null,null,null,null],
    [null,null,null,null,null,null,null,null,null,87.6,null,null,null,null,null,null,null],
     [null,null,94.3,null,null,null,null,null,null,null,null,null,null,null,null,null,null],
    
     [null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,95,null],
   [null,null,null,null,null,91.9,null,null,null,null,null,null,null,null,null,null,null],
     [98.8,93.7,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null],
     [null,null,null,null,null,null,null,null,null,92.5,null,null,92.3,null,null,null,null],
    
  [null,null,null,null,null,null,null,null,null,null,null,null,94.8,null,null,null,null],  
    
   [null,null,null,null,null,null,null,null,null,null,null,null,null,null,96.4,null,null],
    
     ],
  x: [1,2.2,2.3,3.2,3.3,3.9,4,4.1,4.3,4.5,4.6,5.2,6,6.3,6.5,7,7.6],
  y: [0.5,1,1.5,1.7,2.2,2.4,3,3.5,3.8,3.9,4,4.2,4.7,5,5.2,6.3,6.5],
  type: 'contour',
  connectgaps:true,
  contours: {
  start:88,
  end:98,
  size:4,
  showlabels: true,
  labelfont: { family: 'Raleway',
  size: 12,
  color: 'white'
 
 
  } }
 
}];

var layout = {
  title: 'Setting the X and Y Coordinates in a Contour Plot'
};

Plotly.newPlot('myDiv', data, layout);


But i want to like this :