export image to drive

save your result as a Geotiff to your drive

Step 1: Import landsat 8 and mask the clouds. Fill out the ??

var cloudfunction = function(img){
//use add the cloud likelihood band to the image
var CloudScore = ee.Algorithms.Landsat.simpleCloudScore(img);
//isolate the cloud likelihood band
var quality = CloudScore.select('cloud');
//get pixels above the threshold
var cloud01 = quality.gt(40);
//create a mask from high likelihood pixels
var cloudmask = img.mask().and(cloud01.not());
//mask those pixels from the image
return img.mask(cloudmask)
}

var l8 =??
var Phitsanulok = ee.FeatureCollection("users/servirmekong/Phitsanulok")

var l8 = l8.filterDate("??,"??").filterBounds(??).map(??)

Step 2: calculate the median and visualise the result.

var img = l8.??
Map.addLayer(Phitsanulok)
var viz = {min:0,max:0.3000,bands:"??"}
Map.addLayer(img.clip(Phitsanulok),viz)

Step 3: Download the map to your google drive

var exportBands = ee.List(["B1","B2","B3","B4","B5","B6","B7","B8","B9","B10","B11"])

Export.image.toDrive({image:img.select(exportBands).clip(Phitsanulok),
                     description:"Phitsanulok",
                     folder:"/gee_files",
                     region:Phitsanulok.geometry().bounds(),
                     scale:30,
                     maxPixels:1e13})