Blocks

Start by opening a new image 
100x100

Then one 
50x50.

Fill the 50x50 image with a color

Click on and hold the mouse button
down on the layer palette
of the 50x50 image. 
Drag the layer to the 100x100 image.

XOOM IN CLOSE!!

Click on the move tool and 
position the block exactly in the corner.

Like this.

Duplicate the block image.

Mirror the duplicated block

Then flip it.

It should now look like this.

Close the 50x50 image. No need to save.

X out layer1 (empty)

Click on layer2.
Right click: Merge Visible.

Now the layer palette should look like this.

Click on the magic wand.
Click the magic wand on a block, 
hold the shift button down,
(to add another object) and 
click on the second block

Bevel the edges. I used Eyecandy.

Invert the selection

Click on layer 1 to un-X it.
Fill with a color.
And Bevel as before.

You can add a texture if you like.

Save a copy of the block in 
psp format to quickly 
and easily make more.
Add a pattern, tube or whatever you want
to dress it up a bit.