Beaglebone Black won't boot from Micro SD, all LEDs remain lit

I have a problem.
When i started setting up the beaglebone black I misunderstood the instructions and I wrote the image(angstron distribution) to the eMMC of the board and i also wrote a file (initrd.img) to the eMMC and then my computer couldn’t read the beaglebone black anymore.Now when I power the beaglebone black only the led that is seperated from the others is lighting as if its booting but it never finishes and the other leds never light up.Help me what can I do?

Follow the direction from this link to reflash eMMC with original angstron OS https://learn.adafruit.com/beaglebone-black-installing-operating-systems/flashing-the-beaglebone-black