Assignment "optical illusion" or how to draw a hole

In this unit  an art &design asignment will be explained in  a video clip.

Attached to this clip is a transscript of the spoken text. This might help you
to understand what is being said and as an instruction on how to make an
optical illusion assignment yourself.

The gapped text is about  some grammatical problems you come across frequently.
For example: it's(it is or its;    might /may/can;  clould/should/would;   if /when etc.

Click on  green button at the bottom of this page to watch this video clip