To create header image with background repeated image.

gistfile1.js

//require line
var SceneView = require('ui').SceneView;

//`:load` line
var scene = new SceneView({ style: { width: 'fill-parent', height: 36 }});
scene.setLayers(sceneLayers.count);

scene.defineSpritesheet('headerImage', app.imageURL('header_image.png'), 128, 36);
scene.add({
	sprite: 'headerImage',
	x: 0,
	y: 0,
	layer: sceneLayers.image,
	frame: 0
});

scene.defineSpritesheet('background', app.imageURL('header_background.png'), 1, 36);
scene.setLayerBackground(sceneLayers.background, {
	sprite: 'background',
	x: 0,
	y: 0,
	width: 400,
	height: 36,
	tile: true
});

self.add( scene );