Show the derivability of a process using Itô's lemma

Question

We have the process $Xt=log(\sqrt(Bt^2+Wt^2))$. Note that $Bt$ and $Wt$ are two independant standard browninan motions. Now, we need to find an expression with the form: $dXt=...$ I`m pretty sure we will need Itô's lemma, but as a novice in stochastic process, I'm having a hard time to get started...