How to make a whiteboard in $2

The second epidemic (here's the first one) that I was talking about is the 2$ white board I made to remind me of the countless project and ppts I have to submit in the course of getting an MBA. Here's how to go about it:-

1) A 1-metre plastic sheet (the kind used to cover books.
2) A whiteboard marker.
3) Transparent or brown cellotape.

I'm sure the rest is simple. Stick it onto a wall, preferably a white or a light coloured one. Scribble away.