Lets start with the tree trunk. Here I am drawing it with a sketch pen. You can give shades and add branches according to your imagination. You can also use a traced copy or a print out of a tree trunk.
Now apply red colour on your thumb using a brush. Simply press your thumb on tree branches. Here we are representing tree leaves during fall /autumn.
Paint the middle leaves with orange colour.
Add some green leaves at the tip of each branch.
Finally add four or five red leaves on the ground.
Don't touch the leaves until they dry well. You could frame the finger print painting and hang it on your wall.