[Free] Background

Click on the Image > Right Click on the Image > Open image in new tab > Save image as... > Go to your Template Design > Customize > Background > Upload Image > Select the saved image > Done > Apply to Blog

In this section, for the Alignment you can choose any of the options and make it Tile.

For this section of background, you need to change the blog background color so it would fit the background image. The Alignment is still the same, you can choose any of the options but for the tile, select Don't Tile.

Change the color of the background into this red : █████ #AA0000