problem with rooting my nexus initially locked and unrooted nexus 5 with wugfresh nrt

hi .i had a non rooted locked nexus 5 with marshmellow on it.i tried to apply wugfresh2.0.5 root .the drivers test was succesful.then i unlocked and then engaged to rooting.but during the procedure at the end after flashing the busybox and 2 other files my phone is stuck in the 4 moving shapes screen without being able to reboon and start...help!