private void createGrassTop() {
		grassTop = new VertexArray(PrimitiveType.QUADS);
		Color grassTopColor = new Color(106, 190, 137, 255);
		
		grassTop.add(new Vertex(new Vector2f(worldDimensions.left, worldDimensions.height/2), grassTopColor));
		grassTop.add(new Vertex(new Vector2f(worldDimensions.left + worldDimensions.width, worldDimensions.height/2), grassTopColor));
		grassTop.add(new Vertex(new Vector2f(worldDimensions.left + worldDimensions.width, worldDimensions.height/2 - grassMidHeight), grassTopColor));
		grassTop.add(new Vertex(new Vector2f(worldDimensions.left, worldDimensions.height/2 - grassMidHeight), grassTopColor));
	}