In making my poster, i tried to use as many of the tools (as shown above) I started off with a white background to begin with. 300 by 500.

Picking the paint brush, I made it the right size and glided it over the white background turning the backgound black

 

For the title I opened a new window, but making sure not to get rid of the first one, and made the title red and put 'Something Wicked This Way Comes' as part of the first and teaser poster, as not to reveal the title of the film just yet

Here are two screen shots of both background and title, so that way i can flick back and forth to both and to combined the pair.

Here are the results of the finished first poster, it will change over time, maybe not by much, or maybe by a lot. only time will tell.