Hello and thank you for your question. I look forward to assisting you today. About the best way would be to use a flash diffuser. Check this LINK to see what I am referring to. Let me know if you have further questions.
ok but how do i control the intensity from within the camera itself?
The flash intensity is set. You can control it somewhat by varying the ISO speed. Check the attachment I am including. This might help you achieve the results you are looking for.