var imageVisParam = {"opacity":1,"bands":["VH"],"min":-35,"max":-25.8484,"palette":["0d41ff"]},
    imageVisParam2 = {"opacity":1,"bands":["VV"],"min":-18.4784,"max":-18.2983,"palette":["50ff07"]};

var geometry = /* color: #d63000 */ee.Geometry.Point([12.05037, 55.6526]);

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

// 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 2 band stack by selecting from different periods (months)
var im1 =ee.Image(collectionVH.filterDate('2014-10-03', '2018-05-16').mean());
var im2 =ee.Image(collectionVV.filterDate('2014-10-03', '2018-05-16').mean());

Map.centerObject(geometry, 13);
//Map.addLayer(im1, {min: -35, max: -25.8484}, 'VH stack');
//Map.addLayer(im2, {min: -18.4784, max: -18.2983}, 'VV stack');
Map.addLayer(im1, imageVisParam, 'VH stack');
Map.addLayer(im2, imageVisParam2, 'VV stack');