simple background colors

src/tessellate.js

@@ -212,13 +212,15 @@ export class Tessellate {
 		return funky.flatten(this.cartographer.boundingBox(upperLeft, upperRight, lowerLeft, lowerRight));
 	}
 
+	background (color) {
+		this.sketch.background(color);
+	}
+
 	draw (context) {
 		const canvas = context.canvas;
 		const width = canvas.width;
 		const height = canvas.height;
 
-		context.clearRect(0, 0, width, height);
-
 		this.settings.draw({
 			context,