OK I need a little help here people. I have such difficulties with backgrounds. Here for example I started to color the background of this frog picture blue and then decided it was the wrong color and it was taking way to long so I experimented with another kind of background (the green lines) but still have no conclusive background for the picture. Any suggestions on how to choose and make a background would be greatly appreciated. What for example would work for this frog picture? By the way this was done with color pencils.
I think you're art eye is good, you're right to question it.
A simple but powerful idea to remember for a piece like this is that your focal point is the foreground, everything else is background.
The stripes (background) which are a strong pattern, are competing with the frog (focal point), so the eye doesn't know where to go. They're also almost the same colour. Need to be careful with lines as they lead the eye right off the picture.
As to which colour to use, maybe try a nice rainy grey background. Mr frog might stand out against that. Frogs love rain too, sets the mood.
Sorry for the involved answer!
Nicely done, looks great!