new Vertex(0, app.height/3, 0, 0,0,0,255),
};
MTPolygon p = new MTPolygon(vertices, getMTApplication());
p.setName("upper gradient");
p.setNoStroke(true);
p.generateAndUseDisplayLists();
p.setPickable(false);
this.getCanvas().addChild(p);
Vertex[] vertices2 = new Vertex[]{
new Vertex(0, app.height/1.7f, 0, 170,170,140,255),