Extract Pixel Values for Multiple Polygons and Images

I have 21 polygons and for each polygon I want to extract the pixel values inside them for Sentinel 1 images from 2017-01-01 to 2017-06-30.

The example below shows how this is done for one polygon. I want this for 21 polygons.
Extract complete pixel values inside a geometry

My expected output is a csv with columns polygon name, lat, lon, VH, VV and system:time start dates.

This is what I have so far.

//Location Data
var test= loc;
print(test);
Map.centerObject( test, 10);


// SENTINEL 1 DATA  
var pol = ['VV', 'VH']; 
//Load Sentinel1 image location around location 1
var Sentinel1= S1.filter(ee.Filter.eq('transmitterReceiverPolarisation', pol))
                    .filterMetadata('instrumentMode', 'equals', 'IW')
                    .filterDate('2017-01-01', '2017-06-30')
                    .filterBounds(test)
                    .select(['VH', 'VV'])
                    .filterMetadata('resolution_meters', 'equals' , 10).first();

Map.addLayer(Sentinel1, imageVisParam, 'single_image');
print(Sentinel1)

// generate a new image containing lat/lon of the pixel and reproject it to Sentinel1 projection
var coordsImage = ee.Image.pixelLonLat().reproject(Sentinel1.projection())
var joinedImage = coordsImage.addBands(Sentinel1);
print(joinedImage)

// extract lat/lon coordinates as a list
var newfc= test.map(function(feat){
var coords = joinedImage.reduceRegion({
  reducer: ee.Reducer.toList(4), 
  geometry: feat.geometry(),
  scale: 10

}).values().get(0)

coords = ee.List(coords)


//Export as CSV
var myFeatures = ee.FeatureCollection(coords.map(function(el){
  el = ee.List(el) // cast every element of the list
  var geom = ee.Geometry.Point([ee.Number(el.get(0)), ee.Number(el.get(1))])
  return ee.Feature(null, {'VH':ee.Number(el.get(2)), 'VV':ee.Number(el.get(3)),
  'Long':ee.Number(el.get(0)),'Lat':ee.Number(el.get(1))})

}))

return myFeatures
})

var table= newfc.flatten()

print(newfc);
print(table)

// Export the image, specifying scale and region.
// Export the FeatureCollection.
Export.table.toDrive({
  collection: table,
  description: 'TRIAL',
  fileFormat: 'CSV'
});

//_____________________________________

Link to locations table: https://code.earthengine.google.com/?asset=users/rawailnaeem/test

Right now it is working fine for 1 image. I need this for each image in the imageCollection, not a mosaic image. So basically my question is how to loop this function over the entire image collection?