Android Marshmallow boot animation APK now available, check it out here
Are you feeling anxious to get your hands on Google's fresh new OS? Well, don't hold your breath – it'll take a while, especially if you are not in the possession of a relatively new Nexus model. However, now, you can at least gawk at the new boot animation.
It has been pulled from the dev preview ROM of Android Marshmallow and has been made into an .apk. If you wish to install it on your phone, you need to have an AOSP ROM (CyanogenMod, ParanoidAndroid, etc.) or any ROM with CM Theme Engine Support. Alternatively – you can just check it out in the GIF above.
source and download: XDA Developers