the game gives a black screen and crashes

when ever i play a server or a world it crashes it gives a black screen and crashes plz fix as soon as possibel plz i love minecraft pe aand i want to play it plz send a update tom or later but not relly later beacase i want to play thanks for your nice game mojang and plz fix this bug i cant play minecraft pe any more and respons back so i now you readed this plz