How to make a line with a laser pointer

So I was going through a meandering "thought journey" and was thinking about human’s persistence of vision. This can be demonstrated by rapidly moving a laser pointer back and forth, which tricks the human brain into seeing a solid line. This works, since the "point" of the laser inst actually a cartesian point, but a circle with measurable width. Then I was thinking there are actual ways to make a line with the laser pointer. These are the ones I can think of:

1. Hold the end of a laser pointer on the edge of a piece of paper (with a slight angle) and the width of the beam will form a line down the paper
2. Curve the paper and the width of the beam will form a line, relative to the angle of the beam and the curve of the paper
3. Reflect the laser pointer off a straight or curved surface and it will create a line down the paper (Technically, this would work, but seems just an alternate way to do 1 and 2)
4. Use a prism to break the laser into its separate wavelengths (I assume this would technically work, but not be visible)

Are there any other ways to make a line with a laser pointer?

— I hope this isnt off topic here. But this seemed the most likely place on StackExchange to get the right answer.