(function(){
	var color_palettes = {
		alpha: [
			"rgba(0,0,0,0.1)",
		],
		redblue: [
			"rgba(0,0,0,0.2)",
			"rgba(255,0,0,0.2)",
			"rgba(0,0,255,0.2)",
			"rgba(0,255,0,0.2)",
		],
		gray: [
			"rgba(0,0,0,0.1)",
			"rgba(0,0,0,0.2)",
			"rgba(0,0,0,0.3)",
			"rgba(0,0,0,0.4)",
		],
		colors: [
			"rgba(255,0,0,0.5)",
			"rgba(255,128,0,0.5)",
			"rgba(128,255,0,0.5)",
			"rgba(0,255,0,0.5)",
			"rgba(0,255,128,0.5)",
			"rgba(0,128,255,0.5)",
			"rgba(0,0,255,0.5)",
			"rgba(128,0,255,0.5)",
			"rgba(255,0,255,0.5)",
			"rgba(255,0,128,0.5)",
		]
	}

	var select = document.querySelector("#palette")
	select.addEventListener("change", function(){ colors = color_palettes[select.value] })

	window.colors = color_palettes[select.value]
	window.palettes = color_palettes
})()