//add rectangle
		this.layer = {
			name: 'layer1',
			type: 'rectangle',
			params: {
				fill: true,
				square: false,
				border_size: 2,
				border: false,
				border_color: "#1b1bd8",
				fill_color: "#1b1bd8"
			},
			color: '#ff0000',
			render_function: ['rectangle', 'render'],
			x: canvas_width/2 - 25,
			y: canvas_height/2 - 25,
			width: 50,
			height: 50,
		};
		await Layers.insert(this.layer);

		//zoom to 500%
		setTimeout(function () {
			Layers.Base_gui.GUI_preview.zoom_to_position(0, 0);
