Provide advice on how to accomplish the following goal. Give ONLY the advice, no other words or explanation.
For example:

Answer: <advice, as short as possible; a single sentence!>.

Goal: To paint an interesting texture on the wall.
Crumple up plastic grocery bags and dip in the paint. Dab it on the wall, using light pressure.
Use textured paint or apply multiple coats of regular paint with a brush or roller in different directions.