Firstly, go onto paint or microsoft word. I definitely recommend word, as it is easier to drag pictures around, copy and paste etc.
Then, gather your pictures. Some suggestions for pictures (when searching on google images) are: - tumblr roses, tumblr donuts, tumblr sunsets!
Then, once you have found enough pictures, copy and paste them onto a word document. Arrange them the way you like.
You're done! Simply use the snipping tool and snip the background to make it look like a picture and then, save it and set it as your background! Follow & like for more guides!
- microsoft word/paint
- snipping tool