private void createSky() {
		sky = new VertexArray(PrimitiveType.QUADS);
		Color lightSkyColor = Color.WHITE;
		Color darkSkyColor = new Color(87,188,244);
		
		sky.add(new Vertex(new Vector2f(worldDimensions.left, worldDimensions.top + worldDimensions.height/2), lightSkyColor));
		sky.add(new Vertex(new Vector2f(worldDimensions.left + worldDimensions.width, worldDimensions.top + worldDimensions.height/2), lightSkyColor));
		sky.add(new Vertex(new Vector2f(worldDimensions.left + worldDimensions.width, worldDimensions.top), darkSkyColor));
		sky.add(new Vertex(new Vector2f(worldDimensions.left, worldDimensions.top), darkSkyColor));
	}