private void createGround() {
		ground = new VertexArray(PrimitiveType.QUADS);
		Color lightGroundColor = new Color(166, 152, 110, 255);
		Color darkGroundColor = new Color(50, 39, 6, 255);
		
		ground.add(new Vertex(new Vector2f(worldDimensions.left, worldDimensions.top + worldDimensions.height), darkGroundColor));
		ground.add(new Vertex(new Vector2f(worldDimensions.left + worldDimensions.width, worldDimensions.top + worldDimensions.height), darkGroundColor));
		ground.add(new Vertex(new Vector2f(worldDimensions.left + worldDimensions.width, worldDimensions.height/2), lightGroundColor));
		ground.add(new Vertex(new Vector2f(worldDimensions.left, worldDimensions.height/2), lightGroundColor));
	}