The process in pictures.
Here are some of the pieces of plywood that have the parts punched into them.
I had to write on the back of every piece what it is so I could recognise it later.
Next I punched the pieces out of the wood and sanded them on every edge.
And then I laid them all out in piles of pieces that are alike.
On the day I started painting I first laid all the pieces out on a plastic party table cloth.
Then I painted. And painted. And painted some more until I they looked like this.
Now my next job will be to peel them all off the plastic table cloth and hope that the writing on the back is still readable! Then I get to start gluing them onto the walls! Yay! See ya.