Tessellation: Bricks

Click and drag out your canvas so it's about 800 x 800. Make sure you can see your entire canvas in your window at 100%.

Choose the Rectangle shape. Then:

• Make the line thickness the thinnest possible.
• Keep the default colors (foreground = black, background = white)

Click and drag out a rectangle, not too big. You will just see a dotted outline. 

Click off - you should see a solid outline like this...

If you don't, first go to Outline>Solid color - then drag out a rectangle again.

• Select the rectangle with the Select tool (click and drag around it)
• Then move it (drag it) up to the top left corner, not too close to the edge.

With it still selected, click on Copy or CTRL+C...

Before you paste the rectangle, zoom in to 300%...

Then use the Paste button or CTRL+V...

Set the Selection tool to be transparent...

Then you'll see the original rectangle - move the new one over to the right until they're lined up nicely like this...

Change Color 1 to whatever color you like (not black).  Select the Paint Bucket tool and click inside one of the rectangles...

Change Color 1 to another color and fill in the other rectangle...

1. Use the scroll bar at the bottom to move across before pasting the next set.
2. Select everything on your canvas (CTRL+A).
3. Copy (CTRL+C).
4. Paste (CTRL+V).

When moving into place, use arrow keys to slide it over...

1. Move/scroll to where you want to paste the next set of bricks.
2. Select everything on your canvas (CTRL+A).
3. Copy (CTRL+C).
4. Paste (CTRL+V).

Keep going until you've reached the right side...

1. Use the scroll bar at the bottom to go all the way left. 
2. Select everything on your canvas (CTRL+A).
3. Copy (CTRL+C).
4. Paste (CTRL+V).

Move what you pasted so it staggers a bit to the left/ right...

Now scroll down and paste everything down: CTRL+A, CTRL+C, scroll down and CTRL+V.

Repeat 2-3x until you reach the bottom. 

Go to 100% and you should see something like this...

Use the Select tool - draw what you want to keep so you have no empty white spaces...

Then click on the Crop tool...

You should have something like this...