var geometry = /* color: #d63000 */ee.Geometry.Point([5.7788, 52.7005]);


var country = ee.FeatureCollection('ft:1tdSwUL7MVpOauSgRzqVTOwdfy17KDbw-1d9omPw')
  .filter(ee.Filter.eq('Country', 'Netherlands'));

// Get the VV collection.
var collectionVV = ee.ImageCollection('COPERNICUS/S1_GRD')
    .filter(ee.Filter.eq('instrumentMode', 'IW'))
    .filter(ee.Filter.listContains('transmitterReceiverPolarisation', 'VV'))
    .filter(ee.Filter.eq('orbitProperties_pass', 'DESCENDING'))
    .select(['VV']);



// Create a 3 band stack by selecting from different periods (months)
var im1 = ee.Image(collectionVV.filterDate('2016-04-01', '2016-05-30').mean());
var im2 = ee.Image(active_collection.filterDate('2016-06-01', '2016-08-31').mean());

var roi1 = im1.clip(country)
var roi2 = im2.clip(country)


var change = im2.subtract(im1).rename('CHANGE');


// Display the result.
Map.centerObject(geometry, 13);

// Change
var nbrParams = {min: -25, max: 0, palette: ['blue', 'red', 'green']};
Map.addLayer(change, nbrParams, 'Change image');

// Stack
Map.addLayer(im1.addBands(im2), {min: -25, max: 0}, 'VV stack');