Stuck at formatting data (Lenovo A3000-H)

just now i formatted my tab, and when i reboot it, the Lenovo text appears, and suddenly it moves to Android which it removes its body with a core inside of it, and then the core is spinning inside his body. above of the Android's head is a blue bar moving to the left. When i left my tab alone, it suddenly restarted by itself. It repeated for 2 hours. And incidently i pressed a power button, and it says it wanted to format my data. And when i left it alone, it suddenly appears at volume + and power>recovery menu. Can anyone explain to me what's happening??

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