Specific Black to white background

[lewtaylor88]

Hi, can anyone help with changing the background on this from black to white please? I would ideally like it so if I printed out the image on white paper there would be no visible border at all, just the red tree. Is this possible?

Thanks in advance!

 

[sir Tanaka]

gave it a try

 

[Chrislef]

It isnt 100% like it was and it may be slightly unsymmetrical, but I did my best (I used some illustrator too)
im new to this website btw