how to clip Landsat images in google earth engine

Clips an image to a Geometry or Feature.
The output bands correspond exactly to the input bands, except data not covered by the geometry is masked. The output image retains the metadata of the input image.
// A digital elevation model.
var dem = ee.Image('NASA/NASADEM_HGT/001');
var demVis = {bands: 'elevation', min: 0, max: 1500};
// Clip the DEM by a polygon geometry.
var geomPoly = ee.Geometry.BBox(your area coordinate);
var demClip = dem.clip(geomPoly);
print('Clipped image retains metadata and band names', demClip);
Map.setCenter(geomPoly, 8);
Map.addLayer(demClip, demVis, 'Polygon clip');
Map. addLayer(geomPoly, {color: 'green'}, 'Polygon geometry',
Use clipToCollection to clip an image to a FeatureCollection.
How do you clip data in Google Earth Engine?
How do I cut an image from Google Earth?
How do I cut a shapefile in Google Earth Engine?
How do you make a mosaic in Google Earth Engine?

[@MajidMsi]

Thanks, but you just provide a clipped screen, not a variable including clipprd Imagecolection

[@farahkloub3144]

greatful video, please could give me script..