const nPics=3;
const orient=[1,1,1];
let descTxt=[];
descTxt[0]="A bridge across a small lake with trees around. The bridge and trees are reflected in the water.";
descTxt[1]="There is a gate and walls behind of which are trees and a roof of a building.";
descTxt[2]="Behind a branch of a  tree, a stream is flowing down rocks, and water is splashing.";