The Earth's fate was nearly sealed when a race of cybernetic organisms first appeared from the sky in the year 2067. It was soon obvious that they came only for conquest. After nuking most of the planet's major metropolitan cities, the human race was rounded up into squalid settlements so that they could be contained and studied. Completely subjugated, there is no chance for rebellion, only revenge.
Using a clipboard fill can be much more convenient than the pattern fill since you don't need to create a pattern beforehand. Select the marquee tool - you can use any marquee type for this, in this example we'll use a rectangular one.
Select the region you want to use as a pattern.
Press , select 'Edit', then select 'Copy' to copy the selection to the clipboard.
Press , select 'Edit', then 'Deselect' to remove the marquee.
Select the fill tool and press to open the settings.
Choose 'From Clipboard' from the 'Fill Style' menu.
When you are finished with these settings, press the 'Done' button.
Press and release the spacebar or on the region you want to fill.