If somebody interested I have created a boot logo.
To install you need to flash the edp17-hammerhead_sfos-bootimage.zip in recovery.

When my phone boots it looks like:


When it is on the charger:


If you would like to go back to (slightly) original, just flash this: hammerhead_no-padlock-bootimage.zip. (In this one, there is no padlock image at the bottom.)

Enjoy.