Why is my phone flashing after start screen?

Turn my phone on the screen with blue bold like us comes on then when it goes to go to next screen it starts flashing .why?

crwdns2893858:0crwdne2893858:0 crwdns2893862:0crwdne2893862:0

crwdns2894050:0crwdne2894050:0

crwdns2889612:0crwdne2889612:0 1
crwdns2892346:0crwdne2892346:0