Create a background image - 1450 x 1100
Edit it in paint.net until it looks the way you want it to look.

Select Minima template in blogger

Change the code as per the video


Code for blogger

background:$bgcolor;background-image:url(photobucketdirect link);background-position: center; background-repeat:no-repeat; background-attachment: fixed;

margin:0; color:$textcolor; font:x-small Georgia Serif; font-size/* */:/**/small; font-size: /**/small; text-align: center;